... THD<10%,Frequency conversion preheat start,with dimming switch 2D/2C/2U Dimmable Electronic Ballast (Floor Lamp)(01.) Input Voltage range: 220V~240V ... , 110V , wide voltage110V-277V , 50/60 kHz(02.) Wattage range: 16W~ ... 60W(03.) 2C, 2D,2U tubes,e.g. wall lamps & floor lamps( ...