... Voltage optional: 110v ,120v, 220v ,230v , 240v , 277v, and 347v 8) Electronic ballast provide constant light output for mains voltage of ... off technology:= intelligence that takes care of optimal energy-use and safety.11) Reflector optional : high parabolic reflector, lower ... light quality, no stroboscopic flickering, which usually causes headache and irritated eyes. Chart 1 T5 adapter VS T8 lamp ...