HOK 55/200The Philips HOK 55 200 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 647 mm long HOK 55 200 has a factory warranty of 600 hours. optimized spectral output short exposure times short curing times customer approved Length: 647 mm