HPM 12 SThe Philips HPM 12 S compatible* lamp, 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 137 mm long HPM 12 S has a typical lifetime of 600 hours. optimized spectral output short exposure times short curing times customer approved Length: 137 mm