Thinlite model #139 12 VOLT DC STRAIGHT TUBE FLUORESCENT FIXTURES are nearly as efficient as the compact fluorescents though quality of light is lower. This special fixture uses standard AC fluorescent tubes but contains a 12 volt DC electronic ballast. The high frequency ballast gives light without flicker but does interfere with AM radio and weak TV reception. These three models have radio noise filters. Warranty is two years on fixtures, not tubes. This is a surface mount fixture with enclosed bulb and a built-in on-off switch. Regular wall switches can be used to control these lights as well. Constructed of all aluminum with white plastic diffuser cover. Tubes included 32W with one 48" tube, included. 2850 lumens Replacement tubes available locally. F32T8/CW PLEASE NOTE THAT OUR 12V DC LIGHTS DO NOT COME WITH 120V AC TRANSFORMERS.