I currently am running 2 250W HQI bulbs, and 4 65W actinics. I wanted to purchase some of the HQI bulbs in advance, so that I'm not left without when one burns up. The fixture came with Odyssea bulbs, but I hear that's a pretty cheap brand. 1, does the brand make a large difference, and 2, if so what brands are recommended? I was trying to find a place that I could buy several bulbs at a discounted price if anyone knows of such a place! Thanks for the info!!