LEDs Causing Algae on Sandbed

[Madreefer]

Here's my story. I was running two 250W MHs with 4 54W T5s with no problems. I switched over to 4 of the Sol Super Blues. I started out at lower powers and coral looks good. The highest settings I'm run at during the peak of the day is 46-w 75-b 85-ry. I've been getting a copperish color algae on the top of my sandbed. Why and how do I stop it from happening? Too much light? Not enough white? Before all the comments on overfeeding and bad water parameters start. All water parameters are good, using RO water, I have a good skimmer and running phosphate and carbon reactors. I know this is strictly a lighting problem. Just not sure which way I should go with the lighting intensity or time. Dont want to bleach or burn corals.