The Sage NXU440PIS-ROHS is an electronic ballast for Biax (TT5) long twin tube compact fluorescents. The NXU440PIS-ROHS has the leads coming out of the side. It is a program instant start ballast* and operates on 120-277Vac. It measures 9.50 x 2.30 x 1.46 inches. It will operate 3 or 4 25W, 28W, 36W, 39W or 40WBiax (TT5) long twin tube fluorescent lamps.
*A programmed instant start ballast extends fluorescent lamp life by preheating the electrodes before ignition, a "soft start" that reduces wear. Unlike instant start ballasts that quickly apply high voltage (great for energy efficiency but hard on lamps), or rapid start ballasts that continuously heat cathodes (less efficient), programmed instant start ballasts prioritize lamp longevity, especially where lights are frequently switched on and off. They offer a quick, yet gentle, start.