150 Watt Metal Halide Bulbs: Radium vs. Phoenix

[sts04c]

I have a 24 JBJ with a coralife 150 watt Clip-on fixture. I currently have Phoenix 14K with 2 10 watt T5 actnics and I was wondering is the Radium worth the extra 20 some odd dollars? I know it is a whiter (not a word) bulb whereas the Phoenix is Bluer (again) and it is 20k VS.14K. What other differences has anyone noticed? i.e. Corals growing insanely fast, better color

Thanks in advance for the education.
Scott

 

[mockery]

My radium 250 is pretty blue even considering it is being over driven. I'd defiantly give it a try.