Well looks like all those hours in high lamp mode actually did some good! I'd left it set to low lamp mode last time I had it on so it started in that mode last night. Four hour viewing session, no flickering! I was actually quite surprised how bright it appeared just after turning it on so after I'd had it on for about an hour I broke out the i1 DisplayLT probe with HCFR, put the light diffuser on and set it to "ambient light" mode and took several readings at the screen facing the projector. To my amazement it actually measured between 14-16ft-L! Readings were lower on the left side and higher on the right, splitting the difference in the middle. Looks like in addition to smoothing down the electrodes (prevents arc walking which is the main cause of flicker) it also brightened things up, at least subjectively. I wonder if the halogen cycle which prevents tungsten deposits on the inside wall is more efficient in high mode and therefore removes some of these deposits which may have built up after using low mode for an extended period? I'll definitely be running the lamp in high mode for 20-30 hours every couple hundred hours from now on or whenever flickering occurs.
post #8491 of 8724
2/6/11 at 5:39am