600 Lumatek -vs- 1000 Core & Coil

[Beanfish]

I've been running a 600w lumatek (purple) with a cheap ($40) 600w "blue enhanced" MH for 3 weeks with no problems at all.

http://www.mdhydro.com/blueenhancedmh.html

PIC:
The near reflector is a 400w c&c with a standard sylvania MH and the far reflector is the 600w lumatek with the "blue enhanced" MH bulb.