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Sony VPL-VW10HT bulb life


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3 replies to this topic

#1 of 4 OFFLINE   Donald_S

Donald_S

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Posted January 07 2004 - 12:51 PM

I have a friend who has a VW10HT projector that has about 1,300 hours on the bulb in economy mode. He is noticing that the picture is getting darker. He thought that the bulb would either be 100% or burned out, but that apparently isn't the case. Should he be thinking about replacing the bulb? Is it going to go downhill from here? Or is there possibly something else wrong?

Thanks,

Donald

#2 of 4 OFFLINE   Andrew CM

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Posted January 07 2004 - 11:18 PM

Hi Donald

My bulb got too dim by 1500+ hrs to watch Daredevil (economy mode all the way) so it is just the bulb nearing the end of its life span - the 2000 hrs as quoted by Sony is definitely in the YMMV category.
Anyway I had bought a spare bulb and the difference in brightness was like day & night.
So yeah. A new bulb would make a substantial difference.

#3 of 4 OFFLINE   RAF

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Posted January 08 2004 - 03:33 AM

I was still on my first bulb at ~1500 hours when I switched to a Runco DLP projector so I never switched to the spare bulb. I didn't notice an appreciable dropoff in light output, but that might be because of gradual changes over time. I realize that the claims for these bulbs was that they would maintain most of the light output over the length of the bulb life (something like 90-95% according to the graphs I've seen on this) but that last 5-10% might be what is perceived as a bigger dropoff in light output. A lot of this perception has to do with the ambient light conditions of the room.

That said, I have no doubt that people who switch out the bulb once you get well past the 1000 hour mark will see an improvement in light output. In fact, if you have a spare bulb it would probably be a good idea to start using the spare bulb and keep the still useable original bulb for emergency service in case of a problem with the new bulb. As it turns out in my case I gave the VW10HT to my daughter and once she installs it, we'll do exactly that - switching out the old bulb for the new. During transport and storage I decided to stay with the old bulb in place.

As a side note: I never figured, when I purchased my VW10HT in early 2000, that over 3 years later it would still be performing nicely with the original bulb. It definitely exceeded all expectations. With the continual improvement in FPs with an accompanying drop in prices it's beginning to look as though some of the original concerns about bulb life and price didn't turn out to be a real world problem. Sort of like worrying when some of the computer companies switched from "lifetime" to 3 year warranties. 3 years is a long time in the computer industry and home theater equipment is an extension of that.

Moore's Law in action once more.

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RAF
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#4 of 4 OFFLINE   Donald_S

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Posted January 08 2004 - 07:44 AM

Hey guys, that's really helpful, it's *much* appreciated.

Donald