An ex vivo study of photobiostimulation in the treatment of skin pathologies.

What the authors concluded

.The results indicate that even at the early phase of the treatment (7 days), the LLLT at low doses 70 mJ ∙ cm–2 and 140 mJ ∙ cm–2 promotes the deposition of new collagen, slightly higher for 70 mJ ∙ cm–2, and the continuous irradiation with higher doses (700 mJ ∙ cm–2) increases the production of type I collagen

Devices that emit this wavelength

Matched on wavelength within 15nm, since LED bins vary by roughly that much and a tighter match would be false precision. Where we have an irradiance figure, the session length is the time needed to reach this study's dose of 0.07 J/cm² at that intensity.

Matching a wavelength is not the same as reproducing a trial. Session times assume the device's published irradiance is accurate at the distance it was measured, which on brand-claim figures is often optimistic. Where a device publishes both a peak and an average we use the average, and where it publishes a falloff curve we use the lowest figure, so these times run long rather than short. Clinical protocols also control for spot size, contact and skin type in ways a home device cannot.