Bentham produces a fully automated, double monochromator based spectroradiometer system for the hazard classification of lamps in accordance with CIE S 009/E:2002 Photobiological Safety of Lamps and Lamp Systems. Such systems require high spectral resolution over a wide wavelength range (200nm to 3000nm) and must have excellent stray light rejection. Bentham offers a very high precision cosine response diffuser (f2 error <1%) or integrating spheres for spectral irradiance measurements and a variable aperture telescope for radiance measurements. Exposure limits are determined by software.