trumpy the bulb life determed by brightness between new and old one and colour shifting yes ideed if the bulbs are clear one if you look closely to the arc tube ( of course the light will be off anyway for safty sake ) near the end of life the arc tube will deform where the path runs like sagging pattern and also if you look at the manufactures catalog book it will listed the bulb life i know 250 w mh are listed about 15,000 hours or so depend on which type but one probem most factory dont like to cycle the switch for the light they claim it take too long to come back i say balony it is better do that way because you can catch bad one before actally exploding
john i did read that part about the power factoring capatitor that is instering to know but i am not sure about it but before it get out of hand what voltage you are running i know i belive you have 250 v 50HZ if i am correct ?? if so if the phase correction capatior going bad i wondering why they should have a fuse there to protect it from somekind of surge
IMHO : the capatoir do responde diffent between flourscent and hids they are differnt due current spike is diffrent i think that what keep overloading PPC unit
merci marc
