CELLER8 FAQs

General Product FAQs

Can the CELLER8 and mats be used all over the world?

The CELLER8 device is the perfect travel companion and designed to be used globally. Therefore, it will be provided with everything needed to do this. Carry cases for both the full body mat and controller, US/ EU and UK adapters for the plug and a multi-voltage (100-240V) power lead are all included as standard with the full body package. We also stock AU adapters, but these do not come as standard. Please make us aware of this at the time of purchase if you require an AU adapter.

Why did we choose the square wave only?

We could have added multiple waveforms but we committed to only one waveform with the CELLER8, in our attempt to keep this device simple and as effective as it can be the first time around, without adding new elements of confusion for the user. We chose the square wave due to customer feedback and results from years of selling PEMF devices and which waveform we felt was most effective and prompted the quickest results. As well as our own research we committed to the square wave due to the years of previous research and scientific studies using this specific waveform including the studies completed by NASA, who also use a square waveform with great effect. *Thomas J. Goodwin, Lyndon B. Johnson, Physiological and molecular genetic effects of time-varying electromagnetic fields on human neuronal cells, NASA, 2003.

Is the voltage 110V or 240V with the power lead provided?

The CELLER8 device was designed to be used globally, therefore as well as the adapters provided (UK/ US & EU), the power cable supplied with the CELLER8 is multi voltage. It will take any inputs from 100-240V and supply the desired 50-60Hz depending on the input. All of these parts come as standard, to allow the device to be used in most countries without any issues. We also hold AU adapters in stock but they do not come as standard. If you require AU adapter, then please make us aware at the time of purchase.

Why are we called CELLER8?

CELLER8 is a play on words between ‘cells and accelerate’. The 8 in the logo has no reference to an ‘eight’ as a number, as some customers have confused this in the past for the number of coils in the mat or the intensity of the device. Our full body mat has 12 coils and the maximum intensity is 100 Gauss.

The reason we wanted our brand name to represent the words ‘cells’ and ‘accelerate’ is down to the fact that PEMF’s affect our bodies at a cellular level and PEMF’s have been used in the past to accelerate recovery time and the natural healing ability of the body.

Does CELLER8 produce any ‘dirty electricity’ during a PEMF session?

The debate about dirty electricity within some poorly made PEMF mats, are still slightly inconclusive, however we have also covered this with CELLER8®, just in case research prevails. The way we have achieved this, is by ensuring the power for each pulse delivered to the coils inside the mat, always comes from the internal battery and never from the wall plug. This ensures no “dirty electricity” or possible surges from the wall outlet, can affect our precisely produced PEMFs, reducing any interference during a PEMF session with CELLER8®. The wall plug is only essentially used to charge the internal battery and even when plugged in and in use, the power for a PEMF session, always comes from the internal battery as the primary source and never the 60Hz mains.

Is the CELLER8 device FDA cleared?

PEMF’s in general are recognised by the FDA but, the CELLER8 device does not need FDA clearance as a lot of PEMF devices are not registered medical devices, which do not require registration with the FDA. This doesn’t mean the CELLER8 device has not been tested for its safe use. It is still registered as an electronic device to be used in homecare and therefore it has CE/ UKCA certifications. The CELLER8 took over 6 years in development and a lot of this time was taken testing the device with many different regulating bodies to make sure it is safe and all care was taken to make it possibly the best PEMF device on the market.

I want to travel on an airplane with my CELLER8 and mats. Is this okay?

Yes! The CELLER8 is portable and designed to be travel-friendly. You can take it on airplanes, typically in your carry-on luggage. Just be sure to follow your airline’s rules for electronic devices and lithium-ion batteries, and be prepared to remove it for security screening if requested.

Can CELLER8 be used in a sauna?

A unique feature about CELLER8 is that it does not need to be plugged into the mains when using the controller alone or even with one of the mats applied. Therefore, we know of customers that are frequently using CELLER8 inside natural heat and infrared saunas to enhance their session time and results. We have not tested it in a sauna yet, but theoretically, we know PEMF therapy improves blood viscosity, improving the surface area of the cells and enabling a better oxygen & nutrient absorption and distribution as well as improving detox from the cells. Combining this with heat saunas, could enhance the results dramatically. The CELLER8 device is not completely waterproof, however it has been tested in environments from 35-50 C. We would always ask you to check with the sauna manufacturers in the first instance before taking your CELLER8 inside.

What is a ‘slew rate’ and why is it SO important with PEMF devices?

So many devices in the market are compared by the strength or gauss readings, which we are learning, due multiple studies emerging, that slew rate is also incredibly important when selecting a PEMF device for a few reasons. Slew rate in PEMF therapy refers to how quickly the magnetic field changes over time; essentially, the "speed" of the pulse. It's crucial because a higher slew rate creates a stronger electrical response in cells, helping to stimulate healing, reduce pain, and activate deep tissues more effectively. Devices with low slew rates are gentler, ideal for sleep, relaxation, long-term wellness, and microcirculatory benefits while high slew rate systems are better for injury recovery, pain relief, bone healing and athletic performance.

Many brands do not publish their slew rates, either because they do not want to, they consider it confidential, or they simply do not know how to measure them. At CELLER8 we prefer to be as transparent as possible, as we are proud of the device we have created and the results it offers. We also designed the system to fit into both the higher and lower slew rate categories for the complete “all in one system”, without any compromise. Our CELLER8® device slew rate ranges from 4.6T/s - 68T/s. The slew rate is affected by the applicator you are using (higher on the controller and lower on the mats) and the intensity the device is set to during a PEMF session. The higher the intensity, the more the slew rate is affected and therefore the lower the slew rate. Again, the CELLER8® gives the user the complete control over the parameters and if they have a preference of intensity or slew rate. For the average user, we recommend sticking to the preset programs for ease of use and maximum results.

The reason our slew rate was designed to be higher on the CELLER8® compared to the full body mat applicators, ultimately comes down to the long-term goals with each applicator, as higher slew rates are better for targeting pain and acute injuries and the lower slew rates are ideal for full body circulation and overall wellness. During our testing we compared the CELLER8® full body mat to two other multi-therapy PEMF devices, which offer gem stones and far infrared technology on top of their PEMFs, which showed a very weak slew rate of 0.08T/s on one and 0.04T/s on the other system, which is possible to be too cold to illicit little or any therapeutic benefits.

For our full testing results of intensity and slew rates, please contact us and we are usually happy to share.

CELLER8 FAQs

How often do I need to use the CELLER8?

We recommend for the perfect recipe for health and wellness to use the CELLER8 (full body mat if possible) twice per day for the recommended 20 minutes per session. One session in the ‘morning‘ and one session in the ‘evening’ on those program names. You do also have the ability to shorten or lengthen the preset programs and sessions where required if you have more or less time to enjoy some PEMFs.

There are bonus sessions including ‘night’, where you can just use the CELLER8 controller by your pillow to encourage deep and restful slumber and a ‘meditation’ setting, to help find your inner zen whilst also benefitting from the healing benefits of low frequency pulsed electromagnetic fields.

How long is the battery life/ does it take to charge?

Table Example

With a full battery at 21 °c	Celler8 controller and mat	Celler8 controller
Morning program 100% intensity	100 minutes	420 minutes
Night program 20% intensity	36 hours	44 hours
Complete battery charging time	< 5 hours	< 5 hours

With a full battery at 21 °c

Celler8 controller and mat

Celler8 controller

Morning program

100% intensity

100 minutes

420 minutes

Night program

20% intensity

36 hours

44 hours

Complete battery charging time

< 5 hours

What’s the expected life of the CELLER8 controller?

The expected life of the controller, we hope will be a lifetime if looked after. There are no deteriorating parts or serviceable parts, therefore look after it and it will look after you. On the full body mat, the expected life should be anything up to 5 - 10 years. We have done a lot of testing on the mat and on the copper inside and so far, we haven’t managed to break it. But due to the wacky things some customers do to their mats when it comes to folding it up wrong or trying to roll them or sitting on them on a super soft surface, we have been cautious with the warranty for the time being. We hope to extend the warranty on the mats after the device has been in the market longer. Both the mat and controller come in their own carry bag for extra protection when traveling and safe storage.

My CELLER8 device makes a ticking noise. Is that normal?

Yes, this is absolutely normal! This is the same for most PEMF devices that offer higher intensities. Some people prefer that a PEMF device makes a noise, so they know it is working or within a session still. There are a few suggestions if this noise becomes disturbing to your session. Using the full body mat alone will make the ticking noise almost inaudible. So, when you don’t need to use the CELLER8 controller as part of a session, then this will reduce the ticking noise down. When using the CELLER8 controller, you can reduce the ticking by simply reducing the intensity. Reducing it down to 50% in an area with some noise in the background will make it less noticeable. Reducing down to 20% or 10% in a very quiet area will made the controller inaudible to most people. Remember the CELLER8 offers much higher intensities than a lot of other PEMF devices, so if the noise is distracting to a session, then don’t be afraid to reduce the intensity, if desired. Lastly, this ticking sounds louder in most of our user videos than it is in real life due to the sensitive audio equipment used.

The test magnet doesn’t move much on the CELLER8?

This is also absolutely normal and doesn’t mean your CELLER8 controller is faulty. The reason for this is that although the controller is double the strength, the coil inside is very different to the coils in the mat and the magnetic field is much more targeted in a smaller spot. The coils in the mat are large and wide and they give a really wide magnetic field which is perfect for moving the magnet and treating the body. The coil in the controller is tested to 100 guass but it is much smaller and thinner but uses more power from the battery and therefore gives a more focussed energy but annoyingly it doesn’t make the magnet react as the mat does. Rest assured however, the controller is still double the strength of the mat and this is very normal.

Why does CELLER8 offer 1-100 gauss intensity?

This intensity range was not plucked out of the air and there is some evidence to suggest these are the optimal intensities when using PEMFs. One key evaluation was conducted by Mahsa Mansourian and Ahmad Shanei in 2021, which was a review of 92 publications between the years 1999 and 2019. These publications were all studying the cell responses and exchanges in humans and animals when applying PEMFs. They concluded that out of all of these studies the flux densities between 1 and 10 mT (10-100gauss), and chronic exposure more than 10 days would be more effective in establishing a cellular response. These 92 previous studies used a large range of intensities and concluded that the range of which the CELLER8 operates within get the best response from the cells. *M. Mansourian, A. Shanei, Evaluation of Pulsed Electromagnetic Field Effects: A Systematic Review, two decades of research, 2021.

Does CELLER8 use bluetooth?

No! Any additional applicators are connected via a single wire as Bluetooth technology uses very high frequency EMF’s and this could be counterproductive to the low frequency and much more natural PEMF’s intended to be delivered by PEMF technology.

PEMF Mat FAQs

What is the length, width, depth and weight of the mats?

Table Example

Product	Length (cm)	Width (cm)	Depth (cm)	Weight (kg)
CELLER8	14	14	3.2	0.24
Full Body Mat	169	49	2.2	3.4
Travel Mat	81.5	49	2.2	1.7
Mini Mat	42	49	2.2	0.875

Why does the CELLER8 mat only offer PEMF therapy and other mats offer up to 5 different therapies, including PEMF?

Ever heard the saying “jack of all trades, master of none”? well that applies just as much here as it does to fine-tuned and multi-skilled workers. We are aware of other devices on the market that offer multi therapy options in one device and our opinion will always remain the same and to avoid these devices at all costs. Looking at the PEMF element in these devices, they have been added as a box ticking activity and to say that they offer PEMFs, but to a much lower standard than the CELLER8 mats will offer. Always ask them for the intensities of the PEMFs and for their technical information before buying. We know of one of these multi therapy mats that uses an intensity of 0.0008 gauss. When you consider 0.5 gauss comes from the earth naturally, these mats offer very little benefit when it comes to PEMFs.

The CELLER8 was designed with many years’ experience in the PEMF industry and that one therapy has a multitude of benefits, if done precisely. The cost of the copper alone in these mats to create the intensities it offers far exceeds the entire cost of these other multi therapy mats in a lot of cases. There is also an argument to consider the high frequencies used in technologies such as infrared compared to the very essence of the low frequencies that are closer to nature used in PEMF. Are these therapies not just counteracting each other and creating a bit of confusion within each session. Our advice is, stick to one therapy which you know has been done to a very high standard with lots of evidence using each technology alone.

I think the full body mat will be to small for me?

We encourage our customers to not be too worried about the actual mat covering your arms, full width or length if you are larger than the dimensions of the mat. It’s a common question we get. Because our mat has 12 large copper coils inside, spaced around each section and each coil is 50 gauss in strength. This means you get a magnetic field range of at least 2 meters in any direction and an accumulated strength of 600 gauss from the mat. The mat was strategically made this width and length, so that it can be used on armchairs and sofas or small beds and we didn’t want to limit its portability by making it too big.

What polarity should I use and what side of the mat is north polarity?

When it comes to understanding the magnetic polarity of the CELLER8. The grey side of the mat is set to north polarity as default, when ‘North’ is selected in the settings menu. However, to create a perfect sandwich effect, when using both the mat and controller together; it’s advised to use the black side of the mat facing up and attach the controller to your body with the screen facing away from you, which is the natural way to apply it with the strap. This will ensure both the polarities are in harmony and facing the same way. I personally do not feel there is enough evidence to suggest that either north or south polarity are more effective than the other, but to give the body exposure to both, we have added an ‘Alt’ (alternating polarity) mode in the settings menu. This will switch from north to south every minute. More info on this and illustrations can be found in the CELLER8 manual.

What side of the mat should I use? NOT DONE

Red Light Device FAQs

Why does the CELLER8® red light offer different frequencies in Hz? What is the effect of the different frequencies?

The CELLER8 red light panels allow you to set the Hz anywhere from 1-10,000 Hz or choose from preset options including 2.5, 4, 7, 10, 73, 293, 587, and 1147 Hz, as well as a constant mode (which is most commonly used). The reason these panels offer different frequencies is the same as with PEMFs if we expose our bodies to the same frequency every time, there is a possibility the body may become accustomed to it, making it less effective. It is recommended to change the frequency from time to time to keep the sessions new and less familiar, helping to achieve the best and most effective results.

What does EMF emission mean?

EMF emission concerns the safe levels of EMF (high frequency electromagnetic fields). These EMFs are not the good ones and the ones we want to prevent our bodies from being exposed to due to the safe exposure limits set out by electronic certification bodies. So, the reading on the specifications for the red light panels is basically telling a user, at 3 inches away from the panel there are minimal and safe levels of EMF and therefore completely safe and recommended to use from this distance.

Can you lie on the red light panel?

Not recommended no. It is advised to keep the panel on the stand and above the user. If the user wants to expose both sides, they can easily just turn over half way through a session.

Is there a minimum/ maximum distance we have to keep from the red light?

Yes, the user should be at least 3 inches away from the panel and an ideal session the user would be 4-8 inches to maximise the benefits. The electronic stand can easily be lowered to the right level automatically and the controller has memory settings so, you don’t have to adjust it each time. This saves time and effort as the red light will lower to the desired set height each time.

Does the light dimmer affect the session?

Yes, the brighter the light is set, the more effective the session. You can adjust the combined blue and red light, as well as the near-infrared (NIR), from 1% to 100%. We recommend gradually increasing to 100% over several sessions, starting at around 20% to ensure your skin adapts comfortably to higher brightness levels over time.

Are the different wavelengths fixed at different parts of the panel? 480+630+660+810+830+850+940nm

Yes, these are all set within the panel and cannot be moved, but they are equally spread across it. The 480nm is blue light, the 630nm and 660nm are visible red light, and the 810nm, 830nm, 850nm, and 940nm are invisible near-infrared light. You have the ability to select red only, near-infrared only, blue only all together—which is the most common setting, or any combination.

What is the significance of the beam angle?

This is just showing you that each LED will overlap the next one, therefore making the session more effective. If the angle was only 10 degrees for example, it would target less surface area of the body. This again increases and maximises the benefits of each session.

How wide is the light coverage from our red light panel?

The CELLER8 full-body red light panel emits light that spreads outward beyond its physical width. While the panel itself is 41.5 cm wide, the light it emits expands as it moves further from the source. At 6 inches away, the light spreads to 56 cm wide, and at 12 inches, it reaches 71 cm wide. This means you’re getting effective coverage beyond just the panel’s width. Check out our visual guide to see how the light spreads!

Diagram showing the light spread of the CELLER8 full-body red light panel

Can I buy from outside the UK and get worldwide delivery?

Yes, we ship these worldwide (some countries may still be excluded), however please note that outside the UK you will not pay any UK tax at the time of purchase, therefore you will pay the importing tax at arrival of your own country. These importing fees and taxes are your responsibility but this is usually a very easy process and your local customs agents will contact you directly on the details we provide on the order to clear any outstanding fees associated with the import.

Is a full-body panel better than a smaller device?

It depends on your goals. A full-body panel offers the most comprehensive coverage. Ideal if you want systemic benefits, convenience, and to save time by treating large areas at once. A smaller desktop or handheld device is better for targeted support, such as focusing on the face, scalp, or a sore muscle group. With CELLER8, you can choose either option (or even combine them), since both panels use the same clinically-relevant wavelengths and intensity, only the coverage area changes.

What’s the difference between a solar meter and a light spectrometer for irradiance readings?

When companies advertise the “power” of their red light therapy devices, they usually refer to irradiance (measured in mW/cm²). But the tool used to measure it makes all the difference.

Solar meters - A solar meter is designed to measure broad sunlight, not specific therapeutic wavelengths. Because it picks up stray light and heat, it often overestimates the true power of a red light panel. That’s why some brands use solar meters to inflate their numbers and make their device look stronger than it really is.

Light spectrometers - A spectrometer, on the other hand, breaks down the exact wavelengths of light being emitted (e.g., 630nm, 660nm, 810nm, etc.) and gives an accurate measurement of irradiance at those specific points. This is the gold standard for measuring red light therapy devices, because it tells you what’s actually reaching your skin at therapeutic wavelengths.

Watch out for misleading claims! Some companies add disclaimers like “Measured with a spectrometer for accurate numbers”. But if you look closely, they may have actually used both tools, recording inflated solar meter results but labelling them as spectrometer data. Unless you read carefully, it looks like the device was measured to scientific standards when it wasn’t. At CELLER8, we publish both solar meter and spectrometer readings so you can see the full picture. But only the spectrometer data tells you the true therapeutic output of the panel. No shortcuts, no inflated claims.

Why are only some of the lights on the red light panel is in use?

When you look at our red light panels, you might notice that only some of the LEDs appear to be on. They are not broken. In many cases, the bulbs that look “off” are actually emitting near-infrared (NIR) light, which is invisible to the human eye.

This is completely normal and part of how the panel is designed to function. Each LED on the panel is dedicated to a specific wavelength, so it will only illuminate when that wavelength is selected. For example, if you choose blue light, only the blue LEDs will turn on. If you select red and blue together, only those wavelengths will be visibly active, while others, such as near-infrared, will remain unseen. When near-infrared is selected, those LEDs are working, but because that wavelength sits outside the visible spectrum, you simply cannot see it.

PEMF Therapy FAQs

Learn more about PEMF therapy

Is PEMF therapy safe?

Pulsed Electromagnetic Field (PEMF) technology has been researched and used for decades across both clinical and wellness settings. When used as directed, PEMF is safe and non-invasive.

PEMF therapy contraindications

PEMF Contraindications

Implanted Electronic Devices: one of the main contraindication’s of PEMF therapy are for individuals who have a pacemaker, cochlear implant or an intrathecal pump fitted. If you have an implanted electrical device such as a pacemaker, cochlear implant or an intrathecal pump we do not recommend you apply PEMF therapy because there is a risk there is a risk that the magnetic ﬁeld produced by a PEMF device can shut the device off or otherwise interfere with its function.

Organ Transplants: PEMFs are contraindicated in organ transplant patients. PEMF therapy is not advised after an organ transplant as over stimulation could increase the risk of rejection.

PEMF Cautions

Pregnancy: caution is advised during pregnancy. Whilst there is no evidence of harm caused by using PEMFs during pregnancy, their safety has not yet been established.

Neurological Conditions: those with neurological conditions that can cause seizure (e.g epilepsy) are advised to be cautious when using PEMF therapy. Reports of PEMF initiating a seizure are very rare however there is the theoretical potential for this to happen.

Active Bleeding: one of the benefits of applying PEMF therapy is the increase in circulation and blood oxygenation but for people suffering from active bleeding i.e after an operation, this may worsen the blood loss and reduce the ability of the blood to clot in order for it heal over properly. Any source of bleeding should be fully controlled before using PEMF therapy.

Are there any side effects of PEMF therapy?

Across published PEMF research, no negative side effects have been reported.

In higher-intensity PEMF, 3,000 Gauss and above, side effects are rare but can occur if sessions are run for too long or at excessive intensity. In these cases, some individuals may report temporary muscle soreness as high-intensity PEMF can stimulate muscle tissue in a way that feels similar to light exercise. Occasionally, a short-lived “flu-like” feeling is described, often when intensity and duration are increased too quickly. These effects are typically mild and resolve on their own. As with any wellness technology, starting gradually and following recommended usage guidance helps ensure sessions remain comfortable and well tolerated.

Is PEMF therapy FDA approved for anything?

Yes PEMF has gained any FDA approvals for a wide range of conditions, which are listed below:

1979 – FDA approved PEMF therapy for healing non-union fractures.
1987 – FDA approved for adjunct therapy when treating postoperative edema and pain.
1998 - FDA approved PEMF Therapy for urinary incontinence and muscle stimulation.
2004 - FDA approved PEMF Therapy for cervical fusion patients at high-risk of non-fusion.
2006 - FDA approved PEMF Therapy for treatment of depression and anxiety.
2011 – FDA approved PEMF Therapy for treatment of brain cancer.

Are EMFs and PEMFs the same?

No. A big difference between PEMFs and EMFs is that PEMF therapy uses frequencies and magnetic fields at therapeutic levels. PEMF devices are considered healing because they replicate the natural magnetic field and low frequencies of the earth and never reach the high frequencies or heating effects of EMFs. It is unproven that EMFs (such as from wireless devices) have a negative effect on your health but they are also different from PEMFs.

Is there a "safe zone" for PEMF therapy?

Yes all levels of PEMF are safe. You may see some sellers of low-intensity PEMF devices share charts, like the one below, referencing organisations such as ICNIRP or the World Health Organization to suggest there is a defined “safe zone” and that anything above it is dangerous. In reality, this is a marketing tactic used to position low-intensity systems as inherently safer than medium to higher intensity devices. Across decades of PEMF research, studies have used field strengths well above what these charts often label as a “danger zone” without reporting any harmful or negative side effects.

The key point is that those exposure limits were never designed for PEMF therapy. They were created to protect the general public from continuous occupational or environmental electromagnetic exposure, such as power lines, industrial magnets, or MRI fringe fields, where someone could be exposed across their whole body for long periods of time, potentially 24 hours a day. PEMF is entirely different. It is pulsed rather than continuous, applied for short sessions rather than constant exposure, and typically localised to a specific area of the body. Because of this, environmental safety guidelines cannot be directly applied to therapeutic PEMF dosing.

What is the threptic difference between high and low intensity PEMF therapy?

In simple terms, the main difference between low and high PEMF intensities comes down to how they interact with the body and what outcomes they tend to support. Low-intensity systems, typically below 10 Gauss, can be effective but usually work more gradually. Their benefits often build up over time with consistent use, making them well-suited to sensitive users or those looking for gentle, restorative sessions.

Medium-intensity devices, roughly 10–100 Gauss, are often considered the “sweet spot” for most people. This range is the most widely studied and tends to deliver the best balance of comfort, cellular response, and practical results supporting processes linked with pain management, inflammation balance, and tissue repair. In everyday terms, this is where users often report faster and more complete recovery compared to lower or higher ranges.

High-intensity systems, above 100 Gauss (especially those exceeding 1,000 Gauss), produce much stronger fields and are often felt physically as muscle twitching or deep pulsing. While they can provide noticeable, short-term pain relief, they’re generally less consistent for longer-term recovery goals. These systems are typically used in clinical environments for specific applications rather than everyday wellness.

Overall, the medium-intensity range is widely seen as the most balanced strong enough to stimulate a meaningful cellular response, yet gentle enough for regular, restorative use. It’s ideal for supporting recovery and regeneration. High intensity tends to be better suited for instant pain relief or muscle activation issues (such as pelvic floor stimulation), but true healing appears to occur more consistently within the medium-intensity range, as there are no studies showing that high intensity actually promotes tissue regeneration.

What is slew rate?

Slew rate describes how quickly the magnetic field changes during each pulse, in other words, it measures the speed of the rise and fall within the waveform. Two PEMF signals can have the same peak intensity but still behave very differently depending on how fast they reach that peak.

A good example of a waveform has a fast rise time, meaning the pulse reaches its maximum level almost instantly. This creates a steeper slope and a more effective change in the magnetic field. A poor example has a slow rise time, where the signal takes much longer to build up before peaking, resulting in a softer, shallower slope.

PEMF therapy slew rate diagram, good vs bad

Red Light Therapy FAQs

Learn more about red light therapy

Is red light therapy safe?

Yes, red light therapy is considered very safe when used as directed. Unlike ultraviolet (UV) light, it does not damage DNA or cause sunburn. Instead, it uses non-ionising wavelengths that gently stimulate your cells. Side effects are rare and usually limited to mild, temporary skin warmth or redness if the device is used too close for too long. CELLER8 devices are tested for low EMF emissions and built with safety certifications such as CE and FDA registration, so you can feel confident using them at home or in professional settings.

Red light therapy contraindications

Are there any side effects of red light therapy?

Red light therapy is generally very safe, with very few reported side effects. Unlike UV light, it doesn’t burn or damage DNA. The most common effect is mild warmth or slight skin redness if you’ve used the device very close for a long session, but this usually fades quickly. Sensitive individuals may also feel temporary eye strain if they stare directly into the LEDs, which is why it’s best to glance away or use eye comfort measures. All CELLER8 devices are low-EMF, certified, and designed for safe daily use at home or in professional settings.

Is red light therapy FDA approved for anything?

Yes PEMF has gained any FDA approvals for a wide range of conditions, which are listed below:

2002 – FDA cleared PBM devices for relief of minor muscle and joint pain, arthritis, muscle spasms, and increasing local blood circulation.

2003 – FDA cleared PBM for muscle relaxation and stiffness reduction as an adjunctive therapy in physical medicine.

2009 – FDA cleared low-level light therapy (LLLT), a form of PBM, for treatment of carpal tunnel syndrome.

2010 – FDA cleared laser and LED caps for treatment of hair loss (androgenetic alopecia) in both men and women.

2013 – FDA cleared PBM for reducing pain and stiffness associated with knee osteoarthritis.

2018–present – Continued FDA clearance for red light devices for wrinkle reduction, wound healing, and supporting recovery after cosmetic procedures (depending on device and claim).

Can red light therapy improve vision?

Some research suggests low-level red light may help support healthy ageing in the eyes by improving mitochondrial efficiency in the retina. However, these are early-stage findings so think of any benefits as a possible “bonus,” not a primary use case.

What does ‘photobiomodulation’ mean?

Photobiomodulation is simply the scientific term for red light therapy. Broken down, “photo” means light, “bio” refers to life or living systems, and “modulation” means change or influence. In other words, it’s the process of using light to positively influence biology. Scientists prefer this technical term because it captures both the red and near-infrared spectrum and the wide range of biological effects studied in clinical trials. For users, it’s easier to think of it as “red light therapy” a safe, non-invasive way of giving your cells a boost of usable energy.

Do you need to remove clothes for red light therapy?

Yes. For red light therapy to work effectively, the light needs direct access to your skin. Red and near-infrared light cannot properly penetrate through clothing, so fabric will block or significantly reduce the amount of light reaching the treatment area.

For best results, the area you want to treat should be exposed so the light can reach the skin directly.

Red Light Therapy & Tattoos

One of the most common questions we hear is: “Will red light therapy fade my tattoo?” The good news is no! Unlike sunlight and UV exposure, red light therapy doesn’t fade tattoo ink.

In fact, many people use red light therapy to support their skin before and after getting a tattoo. Tattoos are essentially controlled skin trauma, and wavelengths like 630nm and 660nm (both included in CELLER8 panels) are well studied for their ability to support skin quality, calm redness, and aid natural recovery. Using red light in the weeks before getting a tattoo can help condition the skin, and aftercare sessions may support the healing environment.

If you already have tattoos, CELLER8 can still be used confidently for overall skin health, recovery, and wellbeing — without worrying about colour loss.

Red Light Therapy & Sunburn

“Sunburn isn’t just uncomfortable, it’s a form of skin damage caused by UV radiation. Beyond redness and soreness, repeated burns are linked to premature ageing and long-term skin issues. While nothing replaces sensible sun protection (shade, clothing, mineral sunscreen), red light therapy has been studied for both preventing and soothing sunburn.

Pre-conditioning the skin: Studies show that pre-treating skin with 660nm red light can reduce redness and delay the onset of UV-induced burns. In some cases, it acted almost like an SPF-15 buffer.

Calming inflammation: Red and near-infrared wavelengths (like CELLER8’s 630nm, 660nm, 810–850nm) are known to help regulate oxidative stress and inflammatory pathways in skin cells, supporting a faster return to balance after sun exposure.

Supporting repair: By stimulating mitochondria and improving circulation, red light encourages the skin’s natural repair processes, including collagen and elastin production, which can be useful for both prevention and aftercare.

Unlike sunlight, which bombards your skin with the full spectrum (including UV), CELLER8 panels deliver only targeted therapeutic wavelengths. With both 630nm and 660nm plus near-infrared, they provide the blend shown to be most relevant for skin health without heat or UV risk.

Before sun exposure: Short, consistent sessions may help condition the skin over time, making it less prone to UV redness.

After mild sunburn: Sessions of around 5–10 minutes, once or twice daily at close distance (a few cm to 6 inches) can help calm redness and support recovery.

As part of skin care: Regular use contributes to overall skin resilience, complementing your sun-safe habits.

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