Originally Posted by kutlow
yeah if that is true thats cool however the bigger picture is How will the JVC Bulb measure after it has 300 hours on it? It was just reported a gentleman just tested his 300 hour SONY 30 and it hasnt dropped any. In another words the JVC will the new jvc blow its load before 300 hours and return with 50% less light? Only time will tell and I dont have much patience right now.
I've taken something like 100 measurements across 10 different projectors in lumen readings (which pales to how many a pro calibrator has taken, so maybe a pro can weigh in here), and I've never seen a bulb not drop at 300 hours. I'm not saying it's impossible, but I've never seen this.
I have a sneaking suspicion some of these light meters have linearity problems, or people changed a setting on their projectors and forgot about it (or even measured a different mode). Either that or some people are not being 100% honest about it (and I'm not accusing anyone of being dishonest, but come on), so I am not believing some of these absurd readings. I've seen some post a 2% loss at 800 hours, that's malarkey. Most likely they were not taking the reading exactly the same way each time, or standing in the wrong position, or in varying ambient light conditions.
This doesn't mean you'll get a super inaccurate reading, but it could cause readings to drop at points and not be even. Hence, it might not detect the difference between say 400 lumens and 375 lumens properly, it might still just say 400 lumens, but then when it hits 350 lumens, it might say 355 lumens.
You just never know, but some of these lumen measurements by some do not make sense to me.