... PDT led facial equipment 1, skin whiten and rejuvenation 2, acne treatment 3, 1 year warranty 4,CE FeaturesUse the four colors lights ... are the output energy and persistence.4) LED can focus on large area, therefore it ... than ordinary light energy.5) The mature LED technology can achieve the result up to 90 ... Green 527nm, Blue463nm, Yellow 590nm (Normal 3 lights, for OEM you can tell us what color you ...