Introduction Rapid start lamps operate on the principle of utilizing a starting voltage which is insufficient to start the lamps while the cathodes are cold but is sufficient to start the lamps when the cathodes are properly heated. This voltage range between starting cold and starting hot is a very narrow band of voltage which must be closely controlled by the ballast in order to prevent either failure of the lamps to start or instant starting of the lamps with cold cathodes which is detrimental to the lamps. In order to stay within this range of voltage, it is necessary to excite the gas within the lamps by means of an external voltage applied between the lamp and a grounded metallic reflector which acts as a starting aid. Proper installation will assure reliable and efficient operation from the ballast and lamp and maximize their life. Lamp installation We strongly suggest that the lamps be mounted within 1 inch of a grounded metallic reflector. Standard socket available on the market are designed to meet this requirement. Proper seating of the lamp within the socket will provide good electrical contact on each pin of the fluorescent lamp. Ballast installation The ballast should be mounted on a grounded metallic surface. The electrical ground is achieved through the housing of the ballast. Be sure that each wire between the lamp socket and ballast connector make good electrical contact. Note Our experience shows that all lamps are not created equal. The first hundred hours of operation are the most important. After that period, blackening at the end of the fluorescent shouldn’t be visible. If it is, make sure you followed the recommended installation or replace the lamp.