Compatibility: Make sure the projector lamp you purchase can be used with your projector model. An older projector usually requires an inexpensive halogen lamp, while a new one should be used with the more expensive metal halide lamp.
Lamp life: If you intend to use your projector for regular meetings, conferences, and lectures, choose one that uses a metal halide projector lamp that offers 3,000 hours of light when used in the economy mode. For occasional use only, choose a projector that uses a halogen lamp.
Use: Choose a metal halide projector lamp that produces a clear, white light for medical lighting, fiber optics, optical equipment, and cinema projectors. Choose a halogen projector lamp that produces softer yellow light for stage, audio visual, studio, and photography applications.
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