8mm Forum: lamp life of the gs1200 stereo.

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Posted by Andrew Wilson (Member # 538) on June 06, 2006, 11:11 AM:

hello fellow members,whats the average lamp life you gs1200 owners get from your machines?.i'm taking days,weeks etc;not hours.also would the xenon version lamp life be like.andy.

Posted by Douglas Meltzer (Member # 28) on June 06, 2006, 01:03 PM:

Andy,

I believe the bulbs are rated at 25 hours which of course never applies to real (reel?) life. By answering this, I'm sure I've cursed myself to have a blown bulb next time I use the projector.

Doug

Posted by Paul Adsett (Member # 25) on June 06, 2006, 03:01 PM:

Like Doug, I think the 25 hour rated life is optimistic. But, if you only run the GS1200 at the low lamp setting, which is certainly fine up to about a 5ft matt white screen, I suspect the bulb would last a very long time.

Posted by Andrew Wilson (Member # 538) on June 06, 2006, 03:36 PM:

thanks gentlemen.yes your correct paul.my lamp has been used for the passed five months.thats on low setting off course.andy
p.s sorry doug for putting my post in the wrong place.

Posted by John Clancy (Member # 49) on June 07, 2006, 04:36 AM:

I get around 50 hours from a standard GS. Around half that time the lamp is in the low light setting. I've had lamps that run a lot longer but then I've also had some that go after very few hours.

Posted by Jean-Marc Toussaint (Member # 270) on June 07, 2006, 04:44 AM:

That is really unpredictable. My previous lamp (original Elmo ESC) started to turn yellowish after 10-15 hours and died at 20. The new one (actual ESC - 4 coils - but unbranded, found at a supply store for surgical equipment) is still very bright, has been in used for a year, way passed 35/40 hours...

Posted by Andrew Wilson (Member # 538) on June 07, 2006, 11:05 AM:

i suppose its a case of pot luck with the lamps.andy.

Posted by Winbert Hutahaean (Member # 58) on June 08, 2006, 09:43 PM:

I just knew that the lamp life is that so short (5O HOURS!!)

A bit out of topic, is that also applied for 35 mm projectors? If it is the case I could imagine how really un-economical to run a show in a cinema with only less than 10 spectators. A movie could run almost 2 hours (meaning in 25 shows or in 6 days they have to replace the lamp). Not to count yet the eletricity, tax, employees, premises cost, film rental, etc

Posted by Jan Bister (Member # 332) on June 08, 2006, 11:41 PM:

50 hours may seem short... but you'd have to be watching movies for just over 2 full days non-stop (on average) before the bulb blew out. That's really not so bad after all - and it's assuming you use the "high" lamp setting on your projector.

35mm cinemas don't use halogen... that's where xenon and HTI lamps feel at home. (well, that and John Clancy's GS-1200) [Wink]

Posted by Kevin Faulkner (Member # 6) on June 09, 2006, 03:30 PM:

In my opinion I think the ESC lamps are slightly overrun which will increase their light output but shorten their life (quoted 25hrs)

I know that with the std GS's I used to own that I could get more than 25 out of them by running them at the low setting but I did tend to find that the lamps could start to discolour a bit and then I would swap them out because of that. Its important to remember that the Halogen cycle doesnt work to its optimum if the lamps are under run as the cycle only woks correctly at the lamps correct running temperature which is noramlly at full voltage.

I found that it did vary from make to make as well.

This can make it all a bit swings and roundabouts on lamp life.

Kev.

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