Systemic photobiomodulation in nursing professionals with chronic low back pain

What the authors concluded

The mean cost of photobiomodulation was R$ 25.30 ± 0.50, and the mean duration was 1,890 seconds ± 55.0. Regarding the first, fifth, and tenth sessions, labor costs were the highest (66%), followed by infrastructure (22%), supplies (9%), and the laser equipment, which presented the lowest cost (2.8%)." "Systemic photobiomodulation was shown to be a low-cost therapy when compared to other therapi

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 33 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.