Originally Posted by MOberhardt
Hmm, interesting. Yes I have a 675, although I've never run it on high lamp.
Laser life wasn't so much my main concern as opposed to noise and heat. I might end up running medium if the noise if ok in an enclosure - and do the same and manually limit the iris.
It'd be interesting if the actual power consumption if different with different laser levels. The manual doesn't differentiate. Be nice if they gave all figures for different settings (Eg they only show sound levels on low - which is oddly slightly lower than the 675 on low)
Yea, back to comparing to the 675ES. The sound on low laser is almost no noise at all. It's really quiet. On mid laser, it is about like your 675ES on high. You'll hear it during silent scenes but no most the time and yo may get use to it easy. The noise on high laser is louder again. May be distracting. It's not too bad though if you keep your room cooled. Also, it depends on the content you're watching. If you are watching something dark, laser dimming kicks in and the fans will reduce speed. As soon as you kick into mid laser, it will spin up the fans no matter the content. But then shortly after it lowers them as needed.
I never use high laser - ever.
Using the exact same meter as I measured my RS4500, I measured my 675ES at 210 hours on the bulb. It was measured on "bright TV" setting. All these measurements are 16x9 mode. 17x9 uses full panel for more lumens:
1045 lumens low lamp
1709 lumens high lamp.
Compare to RS4500 on natural (a calibrated setting):
1024 lumens low laser
1824 lumens mid laser
My RS4500 on "high bright" measures:
1231 lumens low laser
2247 lumens mid laser
Note that high bright is not really watchable however, you can turn down the green a lot and get something close to watchable.
Even if my meter is off, its the same meter used to compare the 675ES and the RS4500 in the same room so it should give you an accurate expectation on lumens between the two.