Originally Posted by helcio.carvalho
Just read the threads on pg. 115. Very "enlightening" (pardon the pun). I'll be crossing my finges I don't get a bummed bulb and hope to God it goes for at least 1500 hours with no significant drop in light... Sheesh...am I hoping to much?
Thanks yet again, guys...
Yes, you are hoping too much. It is unrealistic to expect no significant drop in output after 1,500 hours.
Here is a posting from an owner of an RS40, which has more lumens than an RS50. Notice that after more tha 1100 hours the output is down to 239 lumens. For his screen that means that 3D is probably unwatchable regardless of how tolerant his is of low brightness.JVC RS40/X3 Calibration Thread
RS40's have an initial output in the 800 to 900 lumen range. This lamp was down to the half-brightness level in just 1000 hours. Since he was running on normal (low) lamp mode, that means that the lamp dimmed in one third of the time of the specified life expectancy of 3000 hours.
This of course is only one data point, but not too many owners have that much usage yet. Since we know these lamps are not of the best quality I think it would be wise if we reigned in over-optimism. Even if the lamp met the specified life expectancy, it is normal for even high quality lamps to lose significant brightness by 1500 hours.