Best MH bulb

[chopsuey]

I currently have XM 10k SE 400w MH bulbs fired by a duel PFO electronic ballast. It's time to replace them but Im not sure if I should stick with the 10k XM or try something else. I have seen other tanks lit with 20k and I like the blue. I however don’t want to sacrifice growth so I was thinking about something in the 12-15k range... maybe... I would like to know which of the following bulbs below would be the best choice for great growth and nice color:

XM 10k
XM 15k

Reeflux 10k
Reeflux 12k

Or any other bulb that you recommend

I want a crisp white bulb that will produce excellent growth with a better 'bluish' color. The XM 10k tend to have a yellowish tint to them. I haven’t tried any other bulb so I’m asking for your opinions on this.

[Ti]

Reeflux 12k should b a good choice.

[theatrus]

The 250W XM15k bulb has less par than the dimmest 20k bulb, so I would not recommend it if that holds true for the 400W.

[markandkristen]

I LOVE my xm 20ks i run them on a magnetic ballast so they are really pushing close to 300 watts each and some where between blue and white.

[oct2274]

radium 20k are beautiful as well, xm 15k is a joke.

[chopsuey]

Originally posted by Ti
Reeflux 12k should b a good choice.

Ive heard nothing but good things about the Reeflux bulbs. I havent seen any tanks lit by these. Do you have the 10ks or 12ks?

[washingtond]

I am currently running 2 ea 250W XM 10K and 2 ea 250W Reeflux 12K and really like the effect and have not notice any major impact on coral growth.
Here is a full shot of our tank with the new lighting arrangement:

[chopsuey]

Im currently running XM 400W 10k with atinic PC suppliment for the blue tint. The XM 10ks seem a lil on the yellow side with out the PCs running.