See why each wavelength earned a place in the NrG platform, inspect representative human research, and understand the dose and measurement context behind the numbers.
Published research has explored the following potential cosmetic and general-wellness applications of specific light wavelengths. Studies may use different devices, wavelength ranges, doses, and treatment methods than NrG Light panels. The items listed are research areas and are not guarantees of individual results.
Device-specific green-light research has explored cosmetic applications related to body contouring, including the appearance of cellulite.
These examples show several wavelength modes available on the NrG Aura, Aurora, and Phoenix panels.
Blue light is available on all NrG models by special request when the panel is pre-ordered. In a special-order configuration, blue light replaces the standard 530 nm green channel.
Blue-light research has explored bacteria-associated blemishes, but results are wavelength- and dose-specific. NrG's optional channel is 480 nm and is presented for cosmetic skincare, not as an acne-treatment or bacteria-killing claim.
Blue-light devices have established, device-specific applications—most notably acne-focused products. That does not automatically make blue the best core channel for a large general-wellness panel intended for repeated use across many session types.
Published reviews describe both useful blue-light effects and the potential for oxidative stress or pigmentation responses depending on wavelength, intensity, exposure time, and skin context. Blue is not inherently “bad,” but it deserves a more purpose-specific protocol.
Green gives the visible spectrum a distinct research channel beyond red and near infrared. When blue light is requested at the time of pre-order, the blue channel is installed in place of the standard 530 nm green channel.
In red and near-infrared photobiomodulation research, mitochondrial photoacceptors and downstream signaling are leading parts of the mechanistic model. No single mechanism explains every wavelength or tissue.
Red and near-infrared light can be absorbed by light-sensitive molecules in tissue. Cytochrome c oxidase is one of the most studied candidates, alongside other proposed pathways.
Research has examined changes in mitochondrial activity, ATP production, nitric-oxide signaling, reactive oxygen species, calcium signaling, and downstream transcription.
Green, yellow, red, and near-infrared light do not necessarily behave through the same dominant pathways. Biological response depends on the optical and biological context.
PBM studies use widely different wavelengths, irradiances, fluences, pulse settings, distances, and exposure times. There is no single universal protocol, which is exactly why controllability matters.
Irradiance describes optical power density at the measurement plane. Higher irradiance delivers energy faster, but it is not a stand-alone measure of biological effectiveness.
A joule measures energy accumulated over time. In light therapy, total energy delivered to each square centimeter is commonly called fluence or dose and is expressed in joules per square centimeter (J/cm²). For continuous output: dose (J/cm²) = irradiance (mW/cm²) × time (seconds) ÷ 1,000. For example, 50 mW/cm² delivered for 200 seconds equals 10 J/cm².
Panel size, lens design, angle, body position, and working distance all affect how much light reaches the target area.
Independent wavelength intensity, pulse, timer, and working distance let you change the session instead of being locked into one fixed recipe.
The NrG Phoenix measured 82.501 mW/cm² at 6 inches on an OHSP-350IR spectrometer. At 3 inches, the TES-1333 solar power meter displayed 1992 W/m²—the equivalent of 199.2 mW/cm².
Many red light therapy devices are advertised using only broadband solar-meter readings, measurements taken directly at or very close to an individual LED lens, or readings taken only 3 inches from a full-size panel. These methods can produce much higher values than a wavelength-resolved spectrometer measurement taken at a realistic working distance. When the instrument, distance, and measurement position are not disclosed, the number may overstate the uniform output reaching the treatment area and can make product comparisons misleading.
Solar-meter readings are not inherently useless, but they require context. The TES-1333 is designed around measuring sunlight, so its sensor can weight concentrated red and near-infrared wavelengths differently than a spectrometer designed to measure irradiance by wavelength.
For transparent comparison, NrG also provides TES-1333 solar-meter readings at 3 inches and clearly labels them as supplemental. Our primary performance standard—and our gold-standard reference—is a wavelength-resolved OHSP-350IR spectrometer measurement taken at 6 inches for panel systems and 3 inches for portable devices.
An irradiance number is more useful when the meter type and measurement distance are disclosed.
Output at the body changes with working distance, so a number without distance is difficult to compare.
Wavelength, irradiance, time, distance, pulse, geometry, and target tissue all matter when interpreting PBM research.