How High to Run Cree XR-E for SPS?

[Bongo Shrimp]

So I finally got my hair algae under control and my params are pretty much perfect. The only thing Im not sure of is how hight to run my LEDs. I have never been sure exactly how much light they put out but I (and most others) seem convoked it is on the too much side as opposed to to little side. Anyhow I have 30 (15 White and 15 Blue) Cree XR-Es in my biocube hood with no optics.

Does anyone know if 100% intensity is too much?