Well I have been reading about Radium 150w 20k bulbs recently. Not as blue as other 20k's with higher PAR, so I got one to try out. Here are some comparison pictures. The pics are taken on full automatic setting on my camera with no photoshop or other enhancement. I really like it. Not as dark blue as the Phoenix 14k I was running and much brighter.
14k #1
14k #2
20k #1
20k#2
