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What is a Projector Lamp?

The technical description of a modern projector bulb is that it is an ultra-high pressure mercury vapor ARC lamp. Projector lamps are categorized as either metal halide lamps or ultra-high pressure mercury vapor lamps. Philips has trademarked the name "UHP lamp" for their projector lamps.

How Does a Projector Bulb Work?

In a projector bulb, there is an ARC gap that is filled with ultra-high pressurized mercury vapor; the lamp operates by sending an electrical current across this pressurized ARC gap. The current lights the mercury vapor, and causes the lamp to produce an extremely bright light. This bright light is shone onto an LCD or DLP panel which in turn produces the amazing images projectors are known for.

Projector bulbs are an extremely complex technology, with specifications for each bulb that are developed at a great cost to the manufacturer. Therefore, the price of projector lamps can be pretty high.