Originally Posted by kraine
I measured yesterday my loss of brightness after 50 hours with my X35, here are the results :
After 50 hours 206 lux. (561 lumens) I lost 60 lux
New lamp after calibration ( 262 lux 717 lumens)
Contraste ratio is now at 20600:1
I'll be checking my X35 again tonight: I don't check the maximum output, just my base line setting which is minimum zoom, iris -15 calibrated with a dE less than 3 at 100%.
My initial reading was 102 Lux after calibration at 15 hours (non calibrated remained at 92 Lux from 0 to 15 hours). Last time I measured my base line output and it had dropped, but only slightly to 94 Lux after 115 hours, so I make that an 8.5% drop, so significantly less than yours. If it matters I've only used high power very briefly, by mistake since I selected a 3D mode by accident when I first had the projector, so that 115 hours is 99% in low power, if it makes any difference.
Out of interest how do you do the contrast measurement? I have a Tecpel 531 Lux meter and also an i1 display Pro enhanced with Chromapure, so I might have to try taking this measurement to see what I'm getting. I'll be disappointed if it's less than 40,000:1 since I'm at minimum zoom and -15 iris, but we'll see.