Let me know what you think of the difference
AWESOME!... much brighter. I replaced one fixture with a 14,000K bulb and left the other fixture with a 20,000K bulb and ran them side-by-side for awhile so I could compare them. There is a substantial difference in brightness, which is exactly what I was looking for, and they're still very blue. Of course, they will probably shift a bit more to the white side as they burn in so we'll see. I struggled over the decision whether to go with the Phoenix (which I ultimately chose), or the CoralVue 14,000K
MH. RC members had a LOT of great things to say about the Phoenix bulbs and it appears that their PAR is a bit higher, so I went with them.
Incidentally, I'm currently running these (2) 150w 14,000K along with 130w 10,000K
PC and 130w 6,700K
PC and I still have a nice blue tint to the tank... it's only yellow for a couple hours each side of the photoperiod because I have those
PC lights come on before and go out after the
MH bulbs. I'm running the 6,700K
PC for a few
SPS frags that I have near the top of the tank.