400 watt bulb choice

[lbj]

I have the older style coral vue 400w electric ballasts. What would the best double ended, 400w bulb choice would you recommend. I'm new to metal halides and need help.
:strooper:

[lbj]

BTW, I'm keeping soft corals and the tank is 30 inches deep.

[james3586]

I like ushio. They tend to be on the white side as I see no blue with the 14k bulb my corals thrive. They also thrive under the 20k with just enough blue to make corals pop. I'm using 20k now with blueline 400 watt electric bal.

[lbj]

i would like to used 20k all so. just not sure what bulb to use.? with coralvue ballast any one else out there......?