... slim fluorescent lighting fixtures 2x40W Fire-proof lamp holder Thickness:0.35mm Color box inner packing CIQ Super slim fluorescent lighting fixturesFire- ... 1x20W,2x40W,2x20W Super slim fluorescent fixture,the electronic ballast can be installed very conveniently with T8 lamp fixture. ... voltage range varies from 160V-250V.4.The electronic ballast works in high frequency beyond 20KHZ,quietly, no negative ...