Brand: Sony
Rear Projection Television Model: KF-50XBR800
Replacement Lamp Module* Part Number: XL-2000, A1484885A, A1601753A

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* For more information on Sony KF-50XBR800 bulb / lamp replacement consult your Sony KF-50XBR800 projector manual or contact: Sony Rear Projection Television Support

Resources:

How to Extend LCD / DLP Projector Bulb Life
Lamp Disposal Guidelines (Digital projector lamps contain mercury)