The school where I work has some REALLY old Kliegl Brothers Fresnel fixtures. The number on the fixtures is 44N8. They also had a very large supply of very old lamps for these fixtures. Well, I finally used the last up and now need to find something to replace that lamp. Unfortunately, someone had taken all the lamps out of the master case & now I do not know what the old lamp number was. According to the Kliegl web site, the lamp number was 1M/G40/23. Anyone out there familiar with what replaces the 1M/G40/23? Your help is greatly appreciated!!