yeah i think i am having that very issue at my home aquarium. i shortened the length of exposure so that they wouldnt bleach out. i have 4 - 3w cree leds and 5 3w royal blue leds from rapid led in this tank and i am afraid it will be too much. i have the lights coming on at 8:30 and shutting off at 7 pm but i might do on at 9am and then shut off at 6 pm that way they are only on when i am at work.