Join Date: Oct 2002
Location: Zigzag Oregon / South Padre Island Texas
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Thought I'd report on my findings with calibrated settings regarding "lamp dimming". My lamp now has over two thousand hours.
With or without the auto iris on or off ( not in semi auto or manual as that does change a full field 100% white reading), my oob reading shooting a 110" screen 0 gain from 12 ft. and cranking up the wl to max, I could get about 26 fl. Frankly, that nearly seared the retinas. Now after the 2000 hrs and all other settings the same I can measure about 24.5 fl.
Once dialed back to my reference wl setting I measure about 14.5 fl, down about 1 fl from new. Making a small wl setting adjustment ( about two clicks up) and once again I'm measuring nearly 15.5 fl which is where I like it.
These are not startling revelations imo. Lamps do weaken just a bit over time and perhaps mine is stable due to not driving it wot all of the time. The lamp may have 45/50 hours running in high mode for 3d stuff.
Anyway, thought you guys might like to know.