TM 10-6640-239-13 3-12 3-4. FLUORESCENT LIGHT FIXTURE LAMP AND STARTER. This task consists of: a. Remove b. Install INITIAL SET-UP Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 1) Equipment Conditions Place appropriate circuit breaker in the OFF position. General Safety Instructions WARNING ELECTRICAL SHOCK Before  performing  any  maintenance  actions  on  electrical  equipment,  ensure  all electrical power has been turned off.  Failure to comply with this warning may result in serious injury or death. NOTE Procedures for removing and installing fluorescent lamps and lamp starters in the emergency  light  fixtures  are  identical  to  the  procedures  outlined  in  Paragraph 3-4.  To test emergency lights, place MAIN CIRCUIT BREAKER A1CB1 in OFF position.  Emergency lights should illuminate. REMOVE 1. Remove Fluorescent Lamp.  See Figure 3-1. a. Loosen four captive screws (1) holding diffuser  (2) to lamp fixture and carefully remove diffuser from light fixture. b. Release lamp retaining clip (3) and rotate lamp (4) until lamp prongs are free from slot.  Remove lamp. NOTE If center (blackout) lamp (5) is the defective lamp, perform steps c and d. c. Loosen four screws (6) and rotate two standoff brackets (7) 180 degrees.  Release lamp retaining clip (3) and rotate lamp (5) until lamp prongs are free from slot. d. Remove tape from both ends of blue filter tube (8) and remove lamp (5).  Retain blue filter tube for installation. 2. Remove Fluorescent Lamp Starter. a. Loosen four captive screws (1) holding diffuser (2) to lamp fixture and carefully remove diffuser from light fixture. b. Rotate starter (9) until prongs are free from slots and remove starter.