OH C 460 SFThis is a TwinPack deal. You'll receive two (2) bulbs. The Original New Colors OH C 460 SF is a high quality bulb made with the finest raw materials. It is designed to provide high actinic output and long service life. The optimized spectral output guarantees rapid curing and short exposure times with the industries best dot to dot quality. The 104. 5 mm long OH C 460 SF has a typical lifetime of 500 hours. optimized spectral output short exposure