Effects of red light on inflammation and skin barrier recovery following acute perturbation. Pilot study results in healthy human subjects.

What the authors concluded

Firstly, red light at low fluence (3.6 J/cm 2 ) decreased the redness induced by histamine iontophoresis at 30 minutes after stimulus, in line with the use of red light in accelerating the resolution of erythema following skin rejuventation treatments ( 5). This effect was not observed with red light at higher fluence (30 J/cm 2 ) , possibly because of the greater increase in skin temperature lea

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 3.6 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.