Lamps must be operated in their specified operating positions in order to maximize lamp performance and life. Incorrect operating positions may also create the possibility of a lamp rupture.Because of these factors it is imperative that users adhere to the specified operating positions and fixture requirements. The following chart shows the correct lamp operating positions based on the Position Code Letters which are contained in the lamp description.
FIXTURE REQUIREMENT CODES
O = Open fixture permissible. Lamps can be operated in an open fixture within the lamp’s specified operating position limits.
E = Enclosed fixture required. Lamps must be operated in an enclosed fixture.
LAMP OPERATING POSITION CODES AND SYMBOLS