Strip Fixtures - 1 and 2 Lamp. Available sizes - 18", 24", 36", and 48". Electronic ballasts, no hum, noise, flicker. For use with T8, T10, or T12 bulbs. If fixture not listed - email your request. *** Optional Miro 4 (Best on Market - 95% efficiency) polished aluminum reflector available for all 2 bulb fixtures (18" Fixtures - # SFREF18, 24" Fixtures - # SFREF24, 36" Fixtures - SFREF36, 48" Fixtures - #SFREF48. Optional switch available for all fixtures (Switch # SW101 - switch located on power cord); (Switch # SW105 - Pull Switch located on fixture).