I have been using Venture Lighting 175 watt 10k mogul base bulbs which have been great (bright white, no yellow). My local shop won't be able to get them anymore. Does anyone know of a good alternate brand? I have only used the Ventures in the past. I'm using 4 VHO's (440 watts -3 blue & 1 white) along with the 2 - 175 watt halides on my 90 gallon reef tank. The color is stunning and I'd like to keep the same balance. I've heard and seen some 10k's that are too yellow. Any suggestions?