I have a DE version of the 10k Reeflux and it looks white with a blue tint. XM bubls just look flat yellow to me and I don't care what kind of growth you get with them. You have to flood so your tank with so much supplemental lighting that it's not worth it to me. In DE bulbs, I really like the BLV bulbs and AB bulbs like Texas Todd suggested and actually like the Aqua Connect bulbs the best. The main problem with them is their Giesseman-esque price tag.

Yeah I've not seen a reeflux bulb look yellow yet. I've seen them look rather blue before burn in and if you watch when the bulb fires, it starts out HUGELY blue and whitens out as it brightens. I run a magnetic ballast.

John