Looking for a 70w DE bulb running off a M98 Ballast

[bmkj02]

Im almost done with my setup on installing a 70w MH to my 24g aquapod. Question is which bulb to get. Looking for a 70w 14k bulb running off a M98 ballast. Which bulb can I use and that is good in color. I want it a little bit more on the blue side but not too much as I have it stocked up well with corals and want them to grow. Thanks

 

[bmkj02]

Okay, after calling different mfg of these differnent bulbs, XM bulbs only claims that will operate off a M98 ballast as well as the M85. The only problem I see is that it only comes in 20k. Is that correct? Does anyone use them and if so whats your opinon?