the talk is that in low lamp mode, it has around 3000 hrs. In full lamp mode, about 2000. I have heard of some having their bulbs go out a 1000 hours. There are some on this board who are around 1000 hrs (I think rlindo is) who are still going strong. I'm at around 400 hrs and no dimming of light output.
It was interesting to talk to the Sanyo guys at CEDIA. They felt bulb life in high-power mode would be around 1200 hours, and in low-lower mode around 2000.
They also felt that people using similar lamp technology and quoting multiple thousands of hours of lamp life were absolutely kidding themselves and their customers.
One thing I don't know (OK, there are many things I don't know), is how the RPTV sets with lamps differ -- or don't. It's clear to me that those sets have to have multiple thousands of hours of lamp life or else they are going to be very tough to sell, say, next year.
Is there some reason the RPTV lamps can last longer? Is there some reason the lamp in a Panasonic AE300 really lasts 2x as long as the lamp on Z1?
On incandensent bulbs, the same bulb's life can be significantly lengthened by lower the power sent to the bulb. For example, the average light bulb will last over 20 years -- if the power driving the bulb is cut in half. (Similarly, a bulb will last longer if it's actually designed for a higher voltage/amperage rating than used in practice).
How does this apply to high-pressure lamps? I don't know.
Panasonic could be doing a better job of focusing light from the bulb through the lens and, in turn, lowering the power sent to the bulb after ignition. On the other hand, the power required to light the bulb is very high, probably can't be reduced, and represents a significant percentage of the bulb's life. So, it's hard to believe they've doubled the life expentancy.
While it's theorically possible that Panasonic may be able to get more life out of the bulb, they aren't guaranteeing this fact. I think it's too early to tell if their claim has any credibility. Therefore, it should not carry a great deal of weight when selecting a PJ.
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