Provided designs of arclamps for various video projectors to help client break into the lamp replacement business. Thermal & optical considerations major here. Very specialized tooling required for testing, inspection, and alignment. Client is thriving. Too many variations of work here to list. I’ve been around high wattage lamps since 1990. Mostly xenon in the 500W to 3KW range. We did have a 7KW lamp once.