Red Light Therapy Wavelengths: What Each Band Actually Does
| Band | Role | Notes from the trial base |
|---|---|---|
| 480nm blue | Surface skin, acne | Rare on panels; useful for surface protocols, switch it off for evening use |
| 630nm red | Surface skin, collagen | Standard across most brands |
| 660nm red | Skin, the market workhorse | Most brands weight it heavily |
| 810nm NIR | Muscle, joints, transcranial research | One of the most-studied deep bands |
| 830nm NIR | Pain, skin-depth crossover | The 633+830 pairing recurs across positive skin trials |
| 850nm NIR | Deep tissue workhorse | Heavily weighted by most brands |
| 1064nm deep IR | Joints, fascia, deepest home band | Only two brands carry it at meaningful density (RLT Home 14%, Helio Cure ~19%) |
How common each band is
Counted across the 188 panels in the database (a panel is counted once per band it lists):
| Band | Panels listing it | Share of database |
|---|---|---|
| 480nm blue | 22 | 12% |
| 630nm red | 114 | 61% |
| 660nm red | 175 | 93% |
| 810nm NIR | 98 | 52% |
| 830nm NIR | 103 | 55% |
| 850nm NIR | 175 | 93% |
| 1060 to 1064nm deep IR | 33 | 18% |
Two bands, 660 and 850nm, appear on nearly every panel; that pairing is the market default. The 810 and 830nm bands appear on roughly half, and the deep-infrared band on about one panel in six. So a panel's wavelength list mostly tells you which of the less common bands it adds; whether those bands carry real power is a separate question, answered only by published density.
Matching a band to a goal
The evidence pages record which wavelengths the cited trials used for each condition, which is the most reliable way to choose: a skin protocol built on 630 to 660nm, a joint or muscle protocol on 810 to 850nm, and the deeper band where the trial base exists. Once the band is chosen, session length comes from the panel's spectrometer irradiance at your distance through the dose calculator, and the 1064nm shortlist covers the two brands that put meaningful density into the deepest band.
Count vs density
A panel can advertise seven wavelengths while placing 80% of its LED power in 660 and 850nm; independent spectral testing has documented exactly that pattern on premium panels. If a brand publishes per-wavelength density, the claim is checkable. If it publishes only a list, it is asking to be taken on faith. The database marks which brands publish density.
Frequently asked questions
Which two wavelengths matter most?
If forced to two: 660nm for surface work and 850nm for depth, which is why the pairing dominates the market. For joints and deep tissue specifically, 810/830/1064nm density is the differentiator.
For more on how the red and near-infrared bands differ beyond just density, see red light versus near-infrared and what the modeling and measurement literature says about how far each band is estimated to penetrate tissue.
To see which panels with five or more bands publish how their output is split, see the ranking of multi-wavelength panels.
For the red bands in detail, see 630nm red light and which panels use it and the 630nm versus 660nm comparison.
For the two near-infrared standards side by side, see 810nm versus 850nm.
For the deep band most transcranial trials used, see 810nm near-infrared.
For the near-infrared band that skin trials paired with 633nm red, including which panels publish an 830nm share, see 830nm near-infrared.
For why these bands, and not blue or far infrared, are the ones panels use, see the optical window explained.
Methodology: rankings weigh measured or method-stated irradiance, wavelength coverage and published density, buyer terms (trial, restocking, stand, warranty), and value per LED. No brand pays for a position. Full methodology.