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Epson 8350 - Bulb Life - Page 2

post #31 of 62
FWIW my 8350 first bulb lasted ~700hrs and died just after warranty ended of course... hopefully the one I just bought lasts longer, but at that point it'll probably be time for a new projector anyways.
post #32 of 62
I decided to take a look at the Epson ELPLP49 lamp with an engineer's eye, since there have been comments that inadequate after-cooling is, or might be, involved in failures.

The lamp itself has axial leads, and is anchored at one end in a white cement, while the other end is free, and fed by a thin wire. Light is emitted radially, and 1/8th of the perimeter is given to the cooling air path, the other 7/8ths being appropriately shaped mirror segments. The other air path is 180 deg. opposite, and but above the mirror, i.e. beyond the end of the lamp, on the opposite side of the bulb envelope. So there is a natural hot-spot in the lee of the airflow, although the experience with high power internal anode tubes suggest that the turbulence in the lee keeps the glass fairly close to the temp of the inlet side.

The weakest points for failure are: the lee hot-spot noted above, and the seal at end of the lamp opposite where it is mounted in cement, where there is only a thin lead to carry away heat.

Once the lamp is extinguished, but airflow remains THERE IS NO LONGER A SOURCE OF HEAT, and all areas monotically decrease in temp. When airflow STOPS there is no longer any effective cooling, and so the heat now redistributes, from the hotter areas, to the cooler areas, which rise in temp until the slow remaining cooling effects cause their eventual decline in temp. During this redistribution process nothing can get hotter than the hottest element when the airflow ceased, and indeed "sharing" the heat will AVERAGE the temps, based on thermal mass.

So if after-cooling is present LONG ENOUGH for the HOTTEST parts to cool to temperatures comparable to what is acceptable for seals and the glass/quartz envelope, no damage will be done when airlow ceases.

Looking at the very small mass that is subject to peak temps when operating, I find it difficult to believe that will not decay to acceptable seal & envelope temperature after just a few seconds WITH NO HEAT INPUT. So while the after-cooling seems brief, I suspect it is adequate, and not involved with the early failures.

My recollection is that earlier Epson lamps had substantially more bulb mass, and would have required longer after-cooling, which was the case.
post #33 of 62
Good observations...... but how do you explain the sagging of the lamp when it fails? Still looks like too much heat to me. Perhaps not enough cooling air flow while operating? But that doesn't explain why this also happens in ECO mode with the fan set for high altitude mode.
post #34 of 62
Quote:
Originally Posted by Tinman View Post

Good observations...... but how do you explain the sagging of the lamp when it fails? Still looks like too much heat to me. Perhaps not enough cooling air flow while operating? But that doesn't explain why this also happens in ECO mode with the fan set for high altitude mode.

Yes, I also had a sagging lamp, also with ECO / High Altitude. In mine the cement that is supposed to hold one end of the lamp in place must have become fluid in the glass reflector pocket, and the lamp drooped, moving it off the reflector focal point, killing the light output. The cement appears plaster or refractory cement-like in a good lamp. We've all heard about Chinese drywall problems from impure materials, perhaps there were ill-advised substitutions made. Epson's first-order fix was to temporarily return to a Japan supplier, where materials science is taken more seriously.
Edited by k2ue - 4/15/13 at 11:07pm
post #35 of 62
Just replaced my lamp today. 1578 hours. The new lamp was from BH Photo, made in China on the box. We will see.

Darren
post #36 of 62
Thanks to everyone who shared the information about the 2-year lamp warranty. My lamp blew out -- even cracked the lens in the lamp assembly -- yesterday, after maybe 1200 hours or so (can't turn on the projector to check the menu). I called Epson to see if they would replace it, and they agreed to send me a new one for free, including shipping. I've had the projector for about 21 months, so the timing was actually pretty lucky.
post #37 of 62
Just had the bulb in my 8100 go out at 850 hours this past week. Epson shipped a new one overnight.
post #38 of 62
My 8700 UB is out of warranty now. I've been generally happy with it. Had one bulb replaced under warranty, over a year ago. Now my second bulb is starting to fail at +1400hr. The image has gotten dark and I'm getting some image wide flicker and some regional flicker. Had to move it to one of the brighter modes (looks horrible compared to the THX mode).

Are the bulb themselves warranties against short run life or is it just the projector?
post #39 of 62
Quote:
Originally Posted by jboehm View Post

My 8700 UB is out of warranty now. I've been generally happy with it. Had one bulb replaced under warranty, over a year ago. Now my second bulb is starting to fail at +1400hr. The image has gotten dark and I'm getting some image wide flicker and some regional flicker. Had to move it to one of the brighter modes (looks horrible compared to the THX mode).

Are the bulb themselves warranties against short run life or is it just the projector?

Answer my own question. They are only warranted against extremely short life. Something like 30 to 90 days.
post #40 of 62
My bulb popped tonight. I have a spare from the rebate program that came with the projector.

Has anyone tried, what appears to be, 'Epson compatible' lamps? ~$55 Here is an example:
http://www.amazon.com/Electrified-ELPLP49-V13H010L49-Replacement-Projectors/dp/B004S79ZI4
If so, what is your opinion of them?

Next , has anyone tried to rebuild a lamp with those $45 raw bulbs?
http://www.ebay.com/itm/V13H010L49-ELPLP49-PROJECTOR-LAMP-FOR-EPSON-BULB-BARE-LAMP-/230777222112?pt=LH_DefaultDomain_0&hash=item35bb64f3e0
If so, what is your opinion of them?

I would be concerned about longevity and color accuracy in both cases.

Thanks
post #41 of 62
Just had to replace the bulb on my 8350 tonight. I hope the second one last as long as the first. The first one lasted 6500+ hours, the past few days tho the picture did start getting really dark.
post #42 of 62
Quote:
Originally Posted by jboehm View Post

My bulb popped tonight. I have a spare from the rebate program that came with the projector.

Has anyone tried, what appears to be, 'Epson compatible' lamps? ~$55 Here is an example:
http://www.amazon.com/Electrified-ELPLP49-V13H010L49-Replacement-Projectors/dp/B004S79ZI4
If so, what is your opinion of them?

I would be concerned about longevity and color accuracy in both cases.

Thanks

I have gone with Electrified before 2x. for Customers. One Lamp came "Dim" and was replaced at no additional Charge immediately, the other was fine OTB and neither have shown any issues over 5-6 months, one of which is a TV-usage PJ. Worries should be set around expectations of longevity from a $55.00 Lamp. Be practical. You can find such discounted lamps for $20-25.00 more with up to 160 day warranty which is itself almost 2x as long as Standard Mfg warranties anyway.

Image quality and color after replacement was spot on......but such things are more LCD Panel and Lens related.

Makes no sense at all to "re-lamp" by changing out just the "Bulb".
Quote:
Originally Posted by Wicked Klown View Post

Just had to replace the bulb on my 8350 tonight. I hope the second one last as long as the first. The first one lasted 6500+ hours, the past few days tho the picture did start getting really dark.

If you paid over $200.00, you should "hope", but accept the fact that you got exceptional life from the first Lamp...over 2x of what is the suggested period. That is not unheard of, but is exceptionally rare.
post #43 of 62
I have an 8350, which I've owned for about a year. The bulb went out on Saturday night. It was noticeably dimmer during the day on Saturday and then all of a sudden on Sat night it wouldn't fire up. I've had the unit for about 11 months and this is the original lamp. I ordered a non-OEM lamp from Amazon on Sunday but today I called Epson and remarkably IMO they are sending a free replacement even though it had only a 4 month warranty on the original lamp. I'd estimate less than 1000 hours of use before the lamp burned out. However, I'm very pleased with Epson's customer service.
post #44 of 62

My bulb just went out at 1500 hours. I had it for about 4 months. (It started getting really faded, then next lamp just wouldn't turn on at all). EPSON said they are sending me a new lamp complimentary for free! I'm a first time projector buyer, so I used the shiz out of the projector, hours every day. Sometimes even left it on while I went to bed. Days off I'd sit there for 5-8 hours using it.

 

Epson support was extremely helpful though. Easy to get their support number, no long wait times, rep was from India but you can clearly understand him luckily, and he was extremely helpful and quick in getting everything sorted. Only disappointed was I couldn't pay more to ship it faster, but no worries.

post #45 of 62
Just to contribute to this thread:

I have an 8700UB and have had 3 lamps fail since I bought the projector almost 3 years ago.

Lamp lifes are approx:

1) 2800
2) 1800
3) 925

With the 3rd failure occurring just last week. I know have a 4th lamp in there. So far I've not had to pay anything additional for lamps. I got the spare lamp with the promo when I bought the projector and the first two lamp failures occurred within warranty, so now, basically 3 years later I'm having to finally install the "spare" (I rotated stock after every initial Epson replacement).

I did not check the first lamp failure, but failures #2 and #3 had a drooping element.

Unfortunately, I really don't have a desire to "upgrade" the projector and for the first time in 3 years I currently do not have a spare sitting on a shelf.

I see prices for an OEM lamp to be about $250 from known vendors and $299 from Epson directly. I don't see much mention of a warranty or guarantee with regards to OEM lamps. Where is everyone getting their replacements? I'm inclined to just get it from Epson if they've switched suppliers for material reasons and if there's a chance that if after 6 months or something a bulb fails prematurely that they'll dip into their known good customer service and send a new one out.
post #46 of 62
Could someone post some pictures of the BARE 8350 lamp outside its cage along with its rough dimensions. Maybe I can suggest something that will help prolong its life. A drooping Issue can be helped by turning the lamp upside down in its case if that's possible. It would also be smart to find out the service menu tricks to speed up the fan(s) and increase the shutdown duration time-- Bohanna
Edited by Bohanna - 10/2/13 at 10:50am
post #47 of 62
Quote:
Originally Posted by Bohanna View Post

Could someone post some pictures of the BARE 8350 lamp outside its cage along with its rough dimensions. Maybe I can suggest something that will help prolong its life. A drooping Issue can be helped by turning the lamp upside down in its case if that's possible. It would also be smart to find out the service menu tricks to speed up the fan(s) and increase the shutdown duration time-- Bohanna

Nothing on the fan shut down time yet, as far as I know. It's clearly too short regardless of what some people claim.

Turning the lamp upside down sounds like a good idea on paper, and by the looks of it you CAN. But you would have to have a schedule to rotate the bulb, that doesn't sound like a practical solution. Also, when it melts, it melts before you realize it.
post #48 of 62
Quote:
Originally Posted by Tinman View Post

Nothing on the fan shut down time yet, as far as I know. It's clearly too short regardless of what some people claim.

Turning the lamp upside down sounds like a good idea on paper, and by the looks of it you CAN. But you would have to have a schedule to rotate the bulb, that doesn't sound like a practical solution. Also, when it melts, it melts before you realize it.

The droop or the dimple is caused by heat and gravity. If you turn the lamp upside down gravity will have the same effect on the arc chamber. You will increase the lamps life by allowing it more time to droop in the chamber. This is providing you haven't let the original droop to progress to the point that the chamber is so distorted that it has moved the arc chamber out of alignment with the reflector. The best thing for the lamp is airflow and shut down cooling time- Bohanna
post #49 of 62

if you're turning it off and on frequently you're gonna shorten your bulbs life.

26.gif

post #50 of 62
Quote:
Originally Posted by Bohanna View Post

The droop or the dimple is caused by heat and gravity. If you turn the lamp upside down gravity will have the same effect on the arc chamber. You will increase the lamps life by allowing it more time to droop in the chamber. This is providing you haven't let the original droop to progress to the point that the chamber is so distorted that it has moved the arc chamber out of alignment with the reflector. The best thing for the lamp is airflow and shut down cooling time- Bohanna

Sure, I used to run a few arc lamp 35mm projectors. But it was pretty easy to turn those lamps. Although they were also cooled properly.
The Epsons, in the ever ongoing attempt to appease the public by building quieter projectors, are likely somewhat under-cooled. Even in High altitude mode.
And let's not forget that the bulb manufacturers are in a never ending quest to make the bulbs cheaper to produce.

It goes on, and on. In my case, I only bought my Epson as a bridge to the LED based units. KNOWING that lamp life on these things was poor, but opting for the best image/low cost as a "temporary" projector.
post #51 of 62
ALWAYS use the HIgh altitude mode!, I am really surprised with ALL the 8350 owners someone doesn't post the steps it takes to go into the SERVICE menu to speed up the fans and increase the shut down Cycle time. MOST of the trouble relating to lamp failure can be directly attributable to this! -- Bohanna
post #52 of 62
Quote:
Originally Posted by Bohanna View Post

ALWAYS use the HIgh altitude mode!, I am really surprised with ALL the 8350 owners someone doesn't post the steps it takes to go into the SERVICE menu to speed up the fans and increase the shut down Cycle time. MOST of the trouble relating to lamp failure can be directly attributable to this! -- Bohanna

Totally agree. I just wish I could find that info. Seems to be a secret so well kept, even the NSA doesn't know about it.
post #53 of 62
Got mine in Feb 2012, love the projector, but my third bulb is just about to die (getting faded).

At least their customer service is great, no questions asked, sending a new bulb...just sucks not trusting it.
post #54 of 62
Quote:
 there is a possibility of that. however with that in mind Epson now warranties the lamp for the FULL TWO YEARS of warranty unlike the normal 90 days that most mfg's utilize. so if you get one they'll swap it out.

Where did this information about the two year warranty come from?

I had to replace a bulb after only 6 months back in March '13 and the email from the support tech said "The normal warranty period on the lamp is 90 days, but we can on occasion do a one time warranty exception. Will need the serial number from the projector for this exception." They did replace the lamp for free, but now i need to replace it again after 9 months with 949 hours logged.

post #55 of 62
Quote:
Originally Posted by 60grit View Post

Where did this information about the two year warranty come from?
I had to replace a bulb after only 6 months back in March '13 and the email from the support tech said "The normal warranty period on the lamp is 90 days, but we can on occasion do a one time warranty exception. Will need the serial number from the projector for this exception." They did replace the lamp for free, but now i need to replace it again after 9 months with 949 hours logged.

Epson had so many VERY early lamp failures recently that due to the many complaints they basically did damage control by extending the lamp warranty to the same as the projector. This went on from the 8100UB to the 8700UB to my knowledge.
I only bought my 8700UB as a gap projector waiting for a decent 1080p LED based unit. I knew full well that the lamp life was no where near the claimed "up to" 4000 hours, more like 1000, hopefully....... maybe.... often less.
However, for the money it was the best image and once I exhaust my last lamp I'll just toss the projector, which IS a great unit..... if only it didn't eat bulbs.... and get an LED.

So that's where the Epson 2 year lamp warranty came from. Because they absolutely blew it and KNEW it.

I do not think that it applies to any projector after the 8700UB, as the design was changed, but time will tell.
post #56 of 62
The last I checked, I had roughly 2300 hours on my 8350 bulb. It had dimmed to the point that I switched from Eco to normal mode to get back to the same brightness. Now that a couple months have passed, I feel the need to get more brightness again, but living room mode is out of the question. Is a call to Epson in order, or do I just bite the bullet and order a new lamp without calling?
post #57 of 62

Well, Epson did give me a free replacement lamp back in March when my 8350 bulb lasted only 6 months. As they had indicated at the time, it was a one-time exception so they are not giving me another free replacement this time after 9 months; here is their reply:

 

"We are sorry to hear that you experienced another lamp failure with your projector. As an additional service to our customers, Epson provided one free lamp replacement for this product outside the lamp warranty period.

 
There are many factors that may contribute to premature lamp failure. The lamp life may vary depending on a number of elements including installation location, usage, mode selected and other environmental conditions. Unfortunately we cannot reimburse you on the lamp."
post #58 of 62
Mine (8350 - lamp) just popped. Approx 1400 hours, pj mounted on the ceiling... in a well ventilated room at constant temp of 70 degrees Fahrenheit.

Purchased the pj from Best Buy in December of 2012. The main reason I purchased it there was to get the 4 year service plan; which covers lamp replacements!!! smile.gif (I called Best Buy Customer Service several times before purchasing to confirm this- which hopefully pays off a few times now knowing of the 8350s low bulb life expectancy.)

With that said, and hearing about Epson covering the one-time bulb replacement in the pj's 2 year warranty period, I have a few questions lingering in my noggin:

1.) Should I just go to Best Buy and get a totally new replacement 8350 Projector instead of calling Epson for a replacement bulb? (Would it make more sense to have a new everything vs just a new bulb?)

2.) Should I call Epson, get a replacement bulb, and then get my entire 8350 replaced with a new one over at Best Buy- so I have new projector AND a spare bulb shipped from Epson? (I feel screwed out of a thousand hours+... it's just a thought)

Or...
3.) Should I just get a replacement bulb from Epson and keep my fingers crossed for a few thousand hours?


Before it popped, it definitely was dimmer for about 2 weeks. Then today as we watched a movie, it got dimmer by the minute until I could barely see anything...then POP! Freaked me out for a second, but it was obvious what had happened. Checked the lamp hours during the movie since it became so dim.

Anyhow, just thought I'd post my experience with the 8350 and its lamp life. Great Projector...although I did notice two small green orbs on the screen after about a few months...and the pj made some horrible grinding noises during startup after a few months new. Wish I would have recorded it so I could share that audio/info in more detail. Oh well.

Thanks to everyone who posted in this thread. I didn't know about the 2 year warranty thing with the lamp, so I'm super glad to have read about it in here! smile.gif
post #59 of 62
Hi guys,

Last night the lamp in my Epson 8350 went out with a bang after 1500 hours.

My projector was bought from Amazon in June 2012 and is still under warranty.

I already contacted Epson to see if they can ship me a new lamp but so far received no answer to my query.

I also looked around the web trying to find some alternatives to the rather pricey genuine lamp in case Epson refuses to send me a new lamp.

What do you think about this lamp http://www.illuminextech.com/Epson-V13H010L49-Projector-Lamp-Assembly-with-Hous-p/epson-v13h010l49.htm?gclid=CJ2nx8ubmb0CFSn4wgod2xwAiQ ?

Is it worth it?
post #60 of 62
Quote:
Originally Posted by AndreiMorar View Post

Hi guys,

Last night the lamp in my Epson 8350 went out with a bang after 1500 hours.

My projector was bought from Amazon in June 2012 and is still under warranty.

I already contacted Epson to see if they can ship me a new lamp but so far received no answer to my query.

I also looked around the web trying to find some alternatives to the rather pricey genuine lamp in case Epson refuses to send me a new lamp.

What do you think about this lamp http://www.illuminextech.com/Epson-V13H010L49-Projector-Lamp-Assembly-with-Hous-p/epson-v13h010l49.htm?gclid=CJ2nx8ubmb0CFSn4wgod2xwAiQ ?

Is it worth it?

in my opinion no, it's not worth buying anything BUT a genuine OEM lamp.
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