20K Radium's, And you don't need any Supplement lighting they are just right by themselves JMO
Bill
Mogul base or HQI bulbs
I have double sided HQI bulbs. Trying to keep SPS happy in my tank.
Currently I have 2x250W bulbs, 1x10,000K for the SPS area, 1x14,000K for soft coral area,
and 4 39w Blue T5..
I'm guessing you are running them with HQI ballasts?