ohmygosh actually in the beginning of this year i got this blue light stuff from my derm.... and well what he was actually doing was 'testing' it compared to a new light called the red light... to see the difference. and my freakin goodness my skin looked so perfect after 2x a week 20 min sessions for 8 weeks!!! all the little bumps AND cysts were gone.... and well the result turned out that red light just works faster than the blue light but generally not MUCH better at all... and i just think blue light is one of the greatest things ever invented... too bad it doesnt last forever though! the results are only supposed to last 3 months and oh yeah it contains no UV rays, it has nothing harmful in it, it merely kills the bacteria under the skin. my derm said i could literally sit under it for days and never get burnt or cancer or anything lol cuz i was pretty nervous about sitting under wierd lights. but anyways, you guys should try it if you have acne and dont want to take medications or are tired of topical creams!