Projector Bulb Blues, Decreased bulb Lifespans? Options

[ComaDave]

I've been running high wattage bulbs in my projectors (H-1's), and I've noticed some degradation in brightness. I was wondering if anyone else had experienced this problem. I'm running 80 watt purple bulbs, which I think may be the first problem. I changed one recently and there were carbon deposits on the bulb, most likely from whatever purple-color coating they used. I'm going to try out some hyper-white bulbs in hopes that the purple-color coating was the problem. If not, then it's back to silver-stars.