... :Features of BIO LIGHT1) Light Emitting Diodes (LEDs) is the latest development from laser industry for low energy light therapy ... .2) The principle of LED is similar as laser which has therapy effect.3) The difference between two are the output energy and persistence.4 ... It is painless, heatless, no side effects, harmless to the skin, no recovery period, no special cares after the therapy, and many ...