I am my high school's lighting designer/technician. We have 40-50 Altman 360Qs (575 watt) and 14 source fours (575 watt). Because of this we have both bulb types...575 FLK and 575 HPL. It is rare for me to change a bulb on a source four, but our 360Qs burn bulbs like nobody's business. I was wondering if their were any alternatives to the FLK preferably with a high lumen output while still having a lamp lamp life of around 1500-2000 hours or even a conversion kit so the 360Qs could accept HPL?