New High Quality Philip's Projector Lamps

The light system in a projector may seem trivial; shine a light on or through an imaging device, and look at the results on a screen. What's the big deal?

The big deal is that photons (light particles) are notoriously difficult to control. Trying to get them to go where you want is a lot like trying to herd cats. You also have to cope with lamp life, and uniformity issues. As a result, projector engineers spend a lot of time struggling with light source problems.

Replacement Lamps

Manufacturer: Philips Lighting
Max Lamp Power: 200 Watts
Max Lamp Current: 2.0 Amps
Max Lamp Operating Voltage: 65 Volts

Ignition Voltage: 5 KV
Bulb Finish: Hard Dichroic Cold Mirror
Bulb Type: PAR-22 Borosilicate with front glass

Reflector Size: Parabolic 65x70mm
Arc Gap: 1.0 mm
Electrodes: Solid tungsten
Atmosphere: Argon + bromine
Luminous Flux: 6000 lm at 100W

                       7000 lm at 120W
Luminous Efficacy: 58 lm/W
Colour Temperature & CRI: CCT : 7600K CRI : Ra 57
Chromaticity Co-ordinates: CCx : 0.298 CCy : 0.311
Rated Life: 8000 hours at 100 W

                 6000 hours at 120 W

More Information

Until recently, most projectors relied on metal halide lamps that use a spark across a gas-filled gap to create the light. The gaps are typically 2 mm or larger. These can have color and luminance stability problems. They also tend to deposit materials such as tungsten on the walls of the lamp during operation, resulting in reduced brightness starting early in the useful life.

Now, most projectors use Ultra High Pressure (UHP) lamps invented by Philips. These use an arc in a pure mercury vapor under high pressure. The arc gap can be 1.3 to 1.0 mm across, creating a much smaller light source. This results in much greater lighting efficiency; a 100 watt UHP lamp in a projector can deliver more light to the screen than a 250 watt metal halide lamp. This advantage increases as the imaging panels get smaller.

Exceeding the brightness of the sun, the UHP lamp is the ideal light source for demanding optical applications.

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