On the studio spot 250 when you enter the lamp hours menu it reads a 4 digit no (5470) then flashes to a diffrent message (in my case the letter M with two digits ex. M15) and then back to the frist 4 digit no. I working on 4 and the owner asked me how many hrs they had, BTW the lamp hours reads 7736 hrs so I know it has more then 5470hrs on the fixture, but I don't think they have 155,470 hrs(M15+5470+155470)
