TRO 4090The Original Theimer TRO 4090 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 280 mm long TRO 4090 has a typical lifetime of 600 hours. optimized spectral output short exposure times short curing times customer approved Length: 280 mm Spectrum: GA