TQH 042051The Original Theimer TQH 042051 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 427 mm long TQH 042051 has a factory warranty of 600 hours. optimized spectral output short exposure times short curing times customer approved Length: 427 mm