Halogen, sunlight, LED produce ATP in cells, vitamin D3 and heal in the 600 to 900nm wavelength

The different wavelengths for "healing" are all using the same principle: simply increasing ATP at the cellular level.

the optimal treatment time for beneath-skin injuries (up to 10 minutes

apply 180 mW/cm^2 of red and/or near-infrared light

Like bright sun, halogen provides an inexpensive source of "healing light energy" in the 600 to 900 nm wavelengths
My (scott@heelspurs.com) interest in light therapy increased a great deal when a halogen treatment returned my black-and-blue broken small toe to almost a normal color in 5 minutes. Pain level went from 8 to 2.  I repeated the treatment 6 hours later when the toe turned blue and painful again and received the same benefits. 

I think 830 nm is best, but maybe 660 nm is better, and in either case, you can just make the less beneficial wavelength have a stronger light source

Injured cells need the extra ATP to repair themselves. Healthy cells may generate extra ATP from the red and near infrared of sunlight to enable more activity in the daytime. If the ATP is not used (as occurs when resting in bright sunlight) it causes an increase in available glucose for which causes a slight "glucose high" that causes relaxation and sleepiness we all feel after 30 minutes in the sun.  BTW, we know UV creates vitamin D that prevents colon, prostate, and breast cancer, greatly improves the immune system, bone strength, and reduces the incidence of osteoarthritis, having the potential to save 50,000 lives a year if people would get more Sun and wear less sunscreen. By comparison, skin cancer causes less than 10,000 deaths in the U.S. each year, only some of which are caused by too much Sun.

They kick-start injured cells into making more ATP. I view red/near-infrared light therapy as beneficial overall as applying ice to injuries, keeping in mind that people greatly under-utilize ice.

I can easily see that sequential pulses of 670 nm, 620 nm, 760 nm, and 830 nm may more efficiently activate CCO (cytochrome c oxidase) than simply constant-on light that I normally promote Here is the website http://heelspurs.com/led.html

and here is info on the laser specifications:

This is a 90 LED unit, with 45 red (660 nm) and 45  infrared  (850 nm) LEDs in a 2.5 x 2.5 inch array providing 250 mW/cm^2 pulses. It is very powerful, requiring a 15-watt power supply and cooling fan to keep the LED array from getting hot. The strength and pulsing method should make it 5 times faster in getting a full treatment than other LED devices. Shoulder, back, neck, knee, and heel injuries can be treated in about 10 minutes with an immediate reduction in pain (typically from an 8 to a 2)

scott@heelspurs.com  is the creator of the healing light device and this post was derived from his expertise.P