Last year after 8 years of using only GE Constant Colour MR16 lamps I decided to make a change to the new and highly touted Ushio Ultraline 10,000hour MR16 lamps. What a mistake! So far I have had to replace almost all of the units I installed in 2006. Most have burned out with only 750 to 1500 hours use! This has become a very costly endeavour for me as I have replaced all of these lamps on warranty. Just yesterday I came to an installation I did in October 2006. The system's hour meter read 1100 hours on it. 33 of the 47 installed Ushio Ultraline BAB-FG 10,000 hr lamps had burned out. (Yes all of the fixtures had between 11.2 and 11.7 volts to them) I would highly recommend that people stay away from these lamps until a solution has been provided by Ushio. In all fairness they have requested that I send some of the burned out lamps to them for analysis and they are going to offer me warranty replacements. (I would prefer a full credit as I am many times bitten now and don't want to re-install problem lamps) Anyone else using these lamps and having problems? Have a great day.