FYI: ANSI type BTN is a 750 Watt lamp. In the same physical style, BTL's are 500, BTN's = 750 and BTR's are the 1K's. I trust others will be along shortly with more useful answers for you.The 1000W lamps in my school's colortran 5/50 Ellipsoidals also burn out quickly as well as our 1000W BTNs in our colortran fresnels. These are the lamps that have always been ordered here. This summer I am letting the maintenance department of the school know what lamps to order. What are some lamps that have similar output to or current FELs ans BTNs that will still work with these fixtures and provide a lamp longer life?
These fixtures have also probably not been cleaned or maintained properly in about 8 years. I am also going to suggest to our director and school that they should be properly cleaned this year and checked this year. What are some good starting resources for cleaning these fixtures?
Toodleoo!
Ron Hebbard