The Average Of Projectors Light Bulbs Life Span What Is The Average Life Time Of The Light Bulb For The DLP Tv? (The Rear Projector Tv)?

What is the average life time of the light bulb for the DLP tv? (The rear projector tv)? - the average of projectors light bulbs life span

I want to buy a DLP TV, but I wonder how often I change the bulb and what the cost?