Crappy Catalina bulbs. I bought a cheap 150w unit fomr them a while ago for a nano. The ballast they use are pretty good, but the bulbs suck. The color of thier bulbs were not very nice. The 14k bulb did not look very nice, and the bulb only lasted 4 months. Switched to a Phoenix 14k bulb and could not be happier. They are inexpsneive, but I would pay the extra $10 and get a good bulb.