In my opinion (if you do not mind the blue look) run at least 2:1 blue to white and mix different blues in with maybe some other colors.Especially with rainbow acans.white light just turns them all red or orange.It does not affect one or two color acans that bad but still will bring out the reds and oranges.LEDs work fine for acans if you keep it low to med (I PREFER LOW FOR ACANS)light.LEDs are stronger than some peaple think.