HighlandReefer
Team RC
IMHO, the GE 6500 is perfect for algae and nothing else in your system. I had increased algae growth using 10,000 K bulbs (I was using 12,000 K bulbs) and switched them out to the Radium 20,000 K bulbs. This decreased the algae growth significantly and my coral, clams & RBTA seem to be enjoying them. 
