14 - 15' from what size screen? Unless it's a very large screen I doubt you will see much sharpness difference. Gary screen won't help with contrast as it is what it is but will lower the black floor. If you have a light colored room a gray screen can help there also with reflected light. I know I would pick the Epson but the LG is also high on the list.
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Epson 5050 vs LG hu810pw
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You have developed a bad habit of misquoting me. I stated: "UHP lamps tend to dim rapidly for the first 500-1000 hrs to 80-75%..."
The NX-5 spec sheet states: "Lamp life: approx. 4500 hours when the lamp is in Low mode". Even if we assume a perfectly linear drop in output that would mean an output of ~89% at 1000hrs using low lamp, but lamp output does not drop linearly:
"How Lamps Age and Fail
The light output of UHP lamps will decrease over time. The light output will be the greatest when the lamp is new and will typically lose on the order of 20% of the original light output over the initial several hundred hours of use. After that the rate of loss of the light output will typically slow down during the remaining nominal life of the lamp. Ideally a UHP lamp’s light loss will be gradual and well behaved in reaching one-half of the original light output after a few thousand hours of use. The lamp life for the UHP lamps used in consumer front projectors is typically rated by the projector manufacturer somewhere between 2,000 hours and 4,000 hours. This rating is for a 50% loss of the original light output. Most projectors will have a high lamp and a low lamp setting (labeled various names by the different projector manufacturers). Many manufacturers will rate the lamp as having a longer operating life when the projector is operated in the low lamp mode."
The Life of a Projector's Lamp - Projector Reviews
Understanding the characteristics of the lamps used in video projectors and going as far as to track the light output of your projector can be a useful exercise for some home theater owners. The industry standard for lamp life is based on a 50% dimming of the lamp. Therefore, when a projector...
www.projectorreviews.com
LG states 97% DCI-P3 coverage in their spec sheets, and I used this figure.
This is from the PC review:
"Gamut is rated at 97% DCI-P3; I measured three dimensional color volume as 143% Rec. 709, 96% DCI-P3, and 65% Rec.2020. Contrast is rated at 2,000,000:1 dynamic with the projector's Adaptive Contrast feature active."
LG CineBeam HU810PW Laser Projector Review
The LG HU810PW—and its sister projector for custom installations, the AU810PB—combine excellent performance with impressive pricing for a laser-based projector certain to garner the attention of home theater enthusiasts.
www.projectorcentral.com
"You have developed a bad habit of misquoting me. I stated: "UHP lamps tend to dim rapidly for the first 500-1000 hrs to 80-75%..."You have developed a bad habit of misquoting me. I stated: "UHP lamps tend to dim rapidly for the first 500-1000 hrs to 80-75%..."
The NX-5 spec sheet states: "Lamp life: approx. 4500 hours when the lamp is in Low mode". Even if we assume a perfectly linear drop in output that would mean an output of ~89% at 1000hrs using low lamp, but lamp output does not drop linearly:
"How Lamps Age and Fail
The light output of UHP lamps will decrease over time. The light output will be the greatest when the lamp is new and will typically lose on the order of 20% of the original light output over the initial several hundred hours of use. After that the rate of loss of the light output will typically slow down during the remaining nominal life of the lamp. Ideally a UHP lamp’s light loss will be gradual and well behaved in reaching one-half of the original light output after a few thousand hours of use. The lamp life for the UHP lamps used in consumer front projectors is typically rated by the projector manufacturer somewhere between 2,000 hours and 4,000 hours. This rating is for a 50% loss of the original light output. Most projectors will have a high lamp and a low lamp setting (labeled various names by the different projector manufacturers). Many manufacturers will rate the lamp as having a longer operating life when the projector is operated in the low lamp mode."
The Life of a Projector's Lamp - Projector Reviews
Understanding the characteristics of the lamps used in video projectors and going as far as to track the light output of your projector can be a useful exercise for some home theater owners. The industry standard for lamp life is based on a 50% dimming of the lamp. Therefore, when a projector...
LG states 97% DCI-P3 coverage in their spec sheets, and I used this figure.
Where is the misquote? That sentence is saying, worst case in 500 hours the lamp could be down to 75%. 75% means 25% loss, which is what I said. So no misquote. You post this all the time, pushing laser projectors. Let laser projectors stand on their own merit, not use fear to promote them. I have a lot of experience with JVC, Sony and Epson lamp based projectors. At some point all of them have had lamp issues, but it has been several years since any of these companies have had lamp problems.
As an example, JVC's lamps have been really good ever since they introduced the RS46 in 2012. None of the JVC lamp based projectors since then have come close to dimming at that rate. Heck there is an old JVC lamp measurement thread, where people tracked lumen loss that proves the loss is much less. The lamp measurement thread was started, because earlier models, pre 2012, did have lamp issues.
"LG states 97% DCI-P3 coverage in their spec sheets, and I used this figure."
Manufacturers make claims all the time. Sound & Vision measured and got 87.3% of DCI color space.LG HU810PW 4K Laser DLP Projector Review Test Bench
The misquote is taking a nuanced statement that indicates a range of probabilities and then taking out the range of probabilities and thus changing the meaning.
Perhaps you can provide some hard numbers for JVC projector lamp dimming versus operation time? This is a user's statement regarding a Sony projector:
"This is my first projector (Sony VPL-VW260ES), and I recently replaced the lamp after 2,500 hours on the old one – pretty much universally on the 'high' setting. It was getting noticeably dim and there was a lot of yellowing in the whites in certain areas of the screen.
Before replacing it, I measured the light emitted using a Lux Metre. Here's the before/after replacement lux readings:
Old: 2,550 hours 131.2
New: 0 hours 193
I decided then to graph out the performance of the new lamp by taking the same measurement every 100 hours. But I was somewhat dismayed to find that after just 100 hours is had lost 15-20% of its 'new' brightness already, with lux reading of 158.6.
My question, then, to you folk with more experience in projectors, is: Is this normal? Or do you think there's something wrong/defective with this lamp?"
Projector Lamp Life and Brightness - Projector Reviews
Find out what the latest projector lamp life and brightness is, how to maximize your lamp life and find a replacement.
www.projectorreviews.com
Do you have a vested interest in promoting any projector brand or technology? I don't, but solid state light sources have many advantages, and are rapidly gaining market share and I find it hard to recommend UHP lamp based projectors anymore, given their obvious disadvantages.
I listed worst case, of his range, which was 25% at 500 hours. First you said I misquoted, which was not true. Now you are saying I misconstrued the statement. It seems even you find that part of his statement ridiculous, since you are trying to argue that I misconstrued his statement.The misquote is taking a nuanced statement that indicates a range of probabilities and then taking out the range of probabilities and thus changing the meaning.
Perhaps you can provide some hard numbers for JVC projector lamp dimming versus operation time? This is a user's statement regarding a Sony projector:
"This is my first projector (Sony VPL-VW260ES), and I recently replaced the lamp after 2,500 hours on the old one – pretty much universally on the 'high' setting. It was getting noticeably dim and there was a lot of yellowing in the whites in certain areas of the screen.
Before replacing it, I measured the light emitted using a Lux Metre. Here's the before/after replacement lux readings:
Old: 2,550 hours 131.2
New: 0 hours 193
I decided then to graph out the performance of the new lamp by taking the same measurement every 100 hours. But I was somewhat dismayed to find that after just 100 hours is had lost 15-20% of its 'new' brightness already, with lux reading of 158.6.
My question, then, to you folk with more experience in projectors, is: Is this normal? Or do you think there's something wrong/defective with this lamp?"
Projector Lamp Life and Brightness - Projector Reviews
Find out what the latest projector lamp life and brightness is, how to maximize your lamp life and find a replacement.
Do you have a vested interest in promoting any projector brand or technology? I don't, but solid state light sources have many advantages, and are rapidly gaining market share and I find it hard to recommend UHP lamp based projectors anymore, given their obvious disadvantages.
What lamp did he buy? Was it a Sony OEM or did he buy an aftermarket lamp? Reason I ask, in 2,550 hours of high lamp usage, the difference between his OEM lamp and the replacement lamp was only 32%. That is a mile away from 20-25% in first 500 to 1,000 hours. Finding a person or two that had a bad experience and then trying to use that one example to categorize the whole projector lamp industry is not science. That is scare tactic.
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