Originally Posted by adrianbrandt
Hmmm, this is an interesting claim. Can you explain exactly how you arrived at this determination? If you would provide this, then others -- in the spirit of the scientific method -- would be able to follow your experimental protocol to see if they can verify this finding. I'm not an electronics or physics (or projector) expert, but I cannot immediately think of what would explain this or what would constitute "proper" electrode burn in (do you mean lamp electrodes, or what?) and how that relates to lamp life. At least if you would share your protocol for arriving at this finding, others could independently evaluate and verify your result(s).
Ah! the Engineer/Scientist.
First off please do research the technology of the these lamps which are used in both front pj's and rear pj tv's regardless of display tech used. They are probable the weakest link and one of the most expensive part and has the shortest life span of any part used in pj's.
They are a High Pressure (up to 250bar after ignited) discharge lamps with Mercury-Halogen gas and tungsten electrodes. They use high voltage to ignite and it is the arc across the two electrodes which have a gap of only 1mm or so. The high voltage jumping across this small gap generates the high lumen light we need.
But the gap wears in time and sometimes slivers grow across the electrodes which tend cause a secondary arc which we see as a flicker; if we are lucky or can cause premature lamp failure if we are not.
After lamp ignition the metal vaporizes which takes time; the reason to leave on for a few hours.
At turn off metal will re-deposit and again takes time; the reason to reduce cycling of power on/off.
As with most electronics the most dangerous times of failure is at turn-on and turn-off.
The studies have already been done. Do the research and draw your own conclusions.
My post was for the new users which are not familiar fragility of these lamps to help them get the most life from them.
Still no guarantees I have had them fail at 50 hours but these guidelines seem to help.