Effects of high and low level lasers on soreness following dry needling in patients with chronic myofascial neck pain. A randomized-controlled trial

What the authors concluded

PPT and nVAS improved in all groups over time. In the placebo group, nVAS increased significantly (p < 0.001) after treatment. VAS, NDI, and ROM improved 48 h after treatment in all groups. The VAS scores were substantially decreased (p < 0.001) immediately after treatment for LLLT group and also 24 h after treatment for both LLLT and HLLT groups.

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 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.