PAT/T550 K2HThe Patent Licht PAT T550 K2H 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 660 mm long PAT T550 K2H has a typical lifetime of 600 hours. optimized spectral output short exposure times short curing times customer approved