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Jason,


Please do clarify this for us Davis owners. No one yet has answered why the 6000 hour bulb and the 2000 hour bulb has the same part number stamped on them. Can you report the part number of the bulb and the hour rating.


Thanks,

Nick
 

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Discussion Starter · #4 ·
These lamps have not changed during their existence. Philips, the manufacturer, started at a more conservative rating of 2K. As they did more testing and they became more confident, they increased the rating to 4K, and eventually to 6K. In truth, they are all the exact same bulb...a 120Watt UHP lamp with the same part number as always. Hope that clears it up.


Thanks!


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Jason Turk

AV Science, Inc.
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I guess the only way to test this is to run my original 2000 hr bulb until it explodes.


Phat,

Did your original bulb show signs of failure before you changed it?



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--Bob
 

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Jason,


Thank you very much, It's amazing that not one projector company (even Chatani themselves) could supply this info.


NickB


[This message has been edited by NickB (edited 08-29-2001).]
 

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Yep it is amazing... so the basic bulb is a 6k bulb ?!?!


I am still using the original bulb (at about 2200 hours) and was wondering if it was much dimmer (it is I am sure dimmer than new but by how much etc is anyone guess)... Well I guess I have another 4000 hours.. EXCELLENT (in best Burns voice http://www.avsforum.com/ubb/smile.gif ) !!! I was going to fit this weekend but now it is just going to be a dust job...


Do they explode or anything nasty or just safely fail ???




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Could this be true of UHP bulbs in general (that their rated lifespan is way less than their actual lifespan)?

Or is there something different about these Davis lamps?


Bob Wood


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Lamps are rated at their 50% output point (half-life). This means that a lamp rated for 1,000 hours will have 50% of its rated output at this many hours.
 

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Does this mean that a bulb now rated at 6k is really a 12k bulb?

Jason you just blew that one.

My bulb will now last forever.


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--Bob


[This message has been edited by REF (edited 08-29-2001).]
 

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This bulb will also work in the davis dsl 800.


While the 800 takes a 150 watter this 120 watt bulb will still work and serve as a cheap backup.


ANYONE INTERESTED BETTER ACT FAST.


Only 9 bulbs available at this price and we just sold a couple.



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Alan Gouger

Thanks for supporting AV Science.
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[This message has been edited by Alan Gouger (edited 08-29-2001).]
 

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Discussion Starter · #13 ·
Lamp companies seem usually seem to rate the life on the conservative side. This protects them should a certain bulb fail earlier than there stated life. Most lamps, if not over driven, will last longer than the stated life...but don't hold me to it! http://www.avsforum.com/ubb/wink.gif


Thanks!


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Jason Turk

AV Science, Inc.
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First off, props to AVS forum for giving us a great deal on this bulb.

This is without doubt the best price available anywhere for this bulb (I've checked!) so jump on this fast.

Secondly, thanks to Jason for the terrific news about the Philips bulb! This clears up what has been some great confusion among Davis owners: namely, how can you tell which bulb you're buying when all the part numbers are the same?

Question answered!



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Robert Clark

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Thanx AVS for clearing up the bulb issue and taking the hit. I'm sure the revelation that the bulb can last 6000 hours can hit future sales of replacement bulbs.


Tim
 

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I think that it is important to know for sure how many hours is the safety time to run a lamp b/c those lamps can explode some times, in fact I've had a LT100 with a broken color wheel b/c the lamp exploded and there is nothing between the lamp and the color wheel.


Federico
 
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