Blog: Guides, Science and Evidence Updates (Page 9)
Every article on the index, newest first. 200 articles.
Irradiance vs Total Power: Which Number Matters?
Irradiance tells you the dose at one spot; total power tells you whole-panel output. Why they diverge, and which one to compare when panels differ in size.
Best HSA/FSA Eligible Red Light Therapy Panels
Which red light panel brands take HSA/FSA payment, how the letter of medical necessity works, and three award picks plus a deep-tissue option compared on specs and terms.
How to Choose a Red Light Panel: A 7-Step Checklist
A 7-step checklist for choosing a red light therapy panel, from goal and wavelengths to method-labeled irradiance, coverage, terms and price.
Bestqool vs Comfytemp: The Budget Panel Battle
Bestqool BQ40 and Comfytemp K4037 compared on price, wavelengths, irradiance claims, warranty and return terms.
How to Read the Irradiance Labels on This Site
The three irradiance labels used on every panel page, what each means, and how to compare figures fairly.
What Is Photobiomodulation? (And Why It Replaced "LLLT")
Photobiomodulation replaced "LLLT" in 2015 once LED research showed the effect works without a laser. The history, the studies and the mechanism.
How Often Should You Use Red Light Therapy?
What the trials actually used, from twice a week for skin (confirmed by a 2025 head-to-head trial) to nightly for sleep, and how to turn it into a home schedule.
Do You Need Eye Protection With Red Light Therapy?
No regulator requires goggles with a red light panel, but 30 of the 41 brands in this index ship eye protection. What the hazard bands say, and when to wear them.