I learned something new the other day. My church has a projector that is around 13 years old. It is rated at 2500 lumens, but was running very dim recently. I checked the lamp hours and it was at only about half the rated life. I decided it was worth the gamble to buy a new lamp and the results were astounding. It is like a new projector again. Apparently, metal halide lamps can age with idle time and not just use time.
Looking back, I think it was getting gradually more feeble the last couple of years so I would replace the lamp at the ten year mark, regardless of how many hours it has on it.
Looking back, I think it was getting gradually more feeble the last couple of years so I would replace the lamp at the ten year mark, regardless of how many hours it has on it.