The right fit for your high-output applications IntelliVoltTM versions now available, 1/2-lamp operation of 4 34/40W T12 lamps;Improved efficiency over magnetic counterparts;Lighter weight with the same mounting and wiring configuration No matter what the conditions require, operating at a variety of line voltages between 120V to 480V, whether located in high ambient temperature environments (requiring a 90 C rating) or not, our family of Philips Advance Centium ballasts are ideal for a wide variety of applications. IntelliVolt versions now available, 1/2-lamp operation of 4 34/40W T12 lamps;Improved efficiency over magnetic counterparts;Lighter weight with the same mounting and wiring configuration Retail, commercial, institutional and industrial applications including; schools, offices, specialty & department stores, warehouses and manufacturing