Projector lamp play important role in image formation. Projector lamp is most important part of projectors and, it is costly part of projectors. So to rise life time of your projector lamps you should place it in aired area, to duck air conflict, air flow should be occurred at that place where projector is placed. If there is some problem in lamp, if it is not working then you wants to replace it then it should be removed at that time when it is not operating. Turn it off before replacing or cleaning it. It should be run 3-4 hours in a day.