Yes, Dr Kahn uses LLLT. But, he does not use it for head injuries, at least not legally yet. He has owned an LLLT equipment manufacturing company for years. http://bioflexlaser.com/clinicians/products/

The research suggests that unless you use the proper wavelength, there is no benefit for neuro issues. The skeletal issues LLLT is used for respond to a much broader range of wavelengths.

The therapy only penetrates 3 cm so about half that may be brain matter. It takes 10 to 20 60 minute treatments to see the benefits.

The question still being researched is low intensity continuous radiation vs higher power pulsed radiation.

I am a hopeful believer in this technology but wonder how it can help with brain injuries that are deeper than 3 cms. I can theoretically imagine a radial array of LEDS that focus enough energy to deeper areas of the brain to provide a benefit.