RQ 5122 Z4The Heraeus RQ 5122 Z4 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 210 mm long RQ 5122 Z4 has a typical lifetime of 600 hours. optimized spectral output short exposure times short curing times customer approved Length: 210 mm