Medical Grade Red Light Therapy Devices: Celluma

June 16, 2021 medical grade red light therapy device wrapped around a thigh

With so many red light therapy devices on the market, it can be difficult to understand the differences and know which one is going to get you the best results to meet your particular needs.

One of the most important things to look for first when examining medical grade red light therapy devices is whether or not it has been reviewed by the appropriate regulatory bodies such as the FDA, TUV, UL, CE, ISO or any other agency that regulates the manufacture of medical devices for safety and for efficacy.

Credentials are Important

If the device does not have these credentials, then this should be a red flag to any licensed professional as well as home-user looking for a medical grade red light therapy device.

As the manufacturer of Celluma, a Class II medical device in the US, BioPhotas is registered and regulated by the FDA, ISO (International Standards Organization) and many other regulatory agencies.

Celluma is also medically CE-Marked as a Class IIa device in Europe, and was the first device of its kind to receive this status.

Quality you can see

You really cannot compare a medical device like Celluma to the kinds of gadgets found on many online sites as it is not a true apples to apples comparison.

One obvious red flag to watch for is when the suggested treatment time for a red-light therapy device is short. For example, only three to five minutes duration. This defies the laws of bio-optical physics for all low-level light therapy devices.

Ask the Right Questions

Therefore, a good question to ask prior to purchasing is: may I see the scientific research that proves that this protocol is effective? Ask for the clinical research (which should be from a credible source, such as Harvard School of Medicine) to support the recommended short treatment sessions. 

Treatment Time is Key

You may find that while there is no scientific research to support this shorter treatment time, there is excellent research to support longer treatment times.

Read on for excerpts from BIPHASIC DOSE RESPONSE IN LOW LEVEL LIGHT THERAPY which describes the many important factors required for light therapy to be effective (full study details noted below) including the relationship between dose, power and time.

Dose-Response, 7:358–383, 2009

Formerly Nonlinearity in Biology, Toxicology, and Medicine

Copyright © 2009 University of Massachusetts

ISSN: 1559-3258

DOI: 10.2203/dose-response.09-027.Hamblin 


Ying-Ying Huang 

Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA; Department of Dermatology, Harvard Medical School, Boston, MA; Aesthetic and Plastic Center of Guangxi Medical University, Nanning, P.R. China

Aaron C.-H. Chen 

Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA; Boston University School of Medicine, Graduate Medical Sciences, Boston, MA

James D. Carroll 

THOR Photomedicine Ltd, 18A East Street, hesham, HP5 1HQ, UK

Michael R. Hamblin 

Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA; Department of Dermatology, Harvard Medical School, Boston, MA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA

 According to this study, “A biphasic dose response has been frequently observed where low levels of light have a much better effect on stimulating and repairing tissues than higher levels of light. The so-called Arndt-Schulz curve is frequently used to describe this biphasic dose response. This review will cover the molecular and cellular mechanisms in LLLT, and describe some of our recent results in vitro and in vivo that provide scientific explanations for this biphasic dose response.

 “Energy (J) or energy density (J/cm2) is often used as an important descriptor of LLLT dose, but this neglects the fact that energy has two components, power and time, Energy (J) = Power (W) × Time (s) and it has been demonstrated that there is not necessarily reciprocity between them; in other words, if the power doubled and the time is halved then the same energy is delivered but a different biological response is often observed.

 “The first law of photobiology states that for low power visible light to have any effect on a living biological system, the photons must be absorbed by electronic absorption bands belonging to some molecular photoacceptors, or chromophores.”

 2.2. Action Spectrum and Tissue Optics

 “One important consideration should involve the optical properties of tissue. There is a so-called ‘optical window’ in tissue, where the effective tissue penetration of light is maximized. This optical window runs approximately from 650 nm to 1200 nm. (Figure 2). The absorption and scattering of light in tissue are both much higher in the blue region of the spectrum than the red, because the principle tissue chromophores (hemoglobin and melanin) have high absorption bands at shorter wavelengths, tissue scattering of light is higher at shorter wavelengths, and furthermore water strongly absorbs infrared light at wavelengths greater than 1100-nm. Therefore the use of LLLT in animals and patients almost exclusively involves red and near-infrared light (600-1100-nm) (Karu and Afanas’eva 1995).”

 2.7. Downstream cellular response

 “Although the underlying mechanism of LLLT are still not completely understood, in vitro studies, animal experiments and clinical studies have all tended to indicate that LLLT delivered at low doses may produce a better result when compared to the same light delivered at high doses.”

There are well-understood and proven parameters that affect the efficacy of all light therapy devices. 

No other device on the market meets these parameters like Celluma. Incidentally, any red light therapy device may be used for five minutes, the results you accomplish will be commensurate with that short treatment time. 

Ethical medical grade red light therapy device manufacturers are not just trying to sell you a device, they are committed to providing science-based guidance so you achieve the best possible results for your clients/patients and yourself.

When it comes to light therapy, longer treatment times will usually result in faster, better and longer lasting outcomes

Research Says it All

There is a great deal of research available about the benefits of red light therapy devices and the impact they can have on improving various skin conditions, including acne and fine lines and wrinkles.

It's also important to choose devices that have FDA clearance. Learn why that’s important here.

Here are some examples of studies done using red LED light therapy and its impact on a variety of skin and pain conditions.

LED Photobiomodulation Therapy for Non-specific LBP in Working Nurses

“Low back pain (LBP) affects approximately 51% to 57% of hospital nurses and nurses' aides in Europe. The study was conducted on nonspecific chronic lower back pain, or NSCLBP, working nurse. Patients were submitted to photobiomodulation therapy with wavelengths of both 630-nm and 850-nm for RED and near-infrared LEDs, with power density set to 8.5 mW/cm2 and 12.5 mW/cm2, respectively.”

Link to study:

Efficacy of low-level laser therapy in the management of neck pain: a systematic review and meta-analysis of randomised placebo or active-treatment controlled trials

“LLLT reduces pain immediately after treatment in acute neck pain and up to 22 weeks after completion of treatment in patients with chronic neck pain.”

This is just one example of how LED light therapy, also known as LLLT, is used to treat pain conditions.

Link to study:

Improvement of pain and disability in elderly patients with degenerative osteoarthritis of the knee treated with narrow-band light therapy

“Pain reduction in the red and infrared groups after the treatment was more than 50% in all scoring methods (P less than 0.05).”

Link to study:

There is a lot of information to consider when thinking about purchasing a red LED light therapy device for skin (like acne) or general chronic pain conditions. Use this information to make sure you are getting a quality FDA cleared device that will provide you with the results you are looking for.



Matt Kovach