Marpan Supply Company, Inc.  
tungsten halogen

 tungsten halogen
 the 'lamp within a lamp'
MB - halogen midbreak is a design similar to a-line, available with inside frost or crystal glass finish, e26 medium base, 3500 hour life, MOL 4 3/8 inches, from 42 to 100 watts. T10 - tubular in shape, clear glass or inside frosted finish, e26 medium base, for porcelain sockets only, diameter 1 1/8 inches, MOL 4 1/8 inches, 75, 100, 150 or 250 watts.
BT4, T4, & MR16 - bi-pin bt4 infrared with a clear glass finish in 37 and 50 watts, bi-pin T4 with a clear or frosted finish in 25, 40 or 60 watts, 2-pin mr16 infrared with uv stop capsule in 37 and 50 watts. PAR - a full line of capsyliteŽ halogen lamps in a variety of configurations, par14, par16, par20, par38, borosilicate glass, tungsten halogen capsule that is made of either quartz or glass and contains a filament, lead wires and a halogen gas mixture.
see a similar product line
called quartz