Lighting system Exposure of cool white fluorescent tube light for 1.2 mil Lux hours and UV-A light for 200-watt hours per square meter on the test sample. Cool white, near ultraviolet, full spectrum, and dual source cool white LUV banks are designed to meet options 1 and 2 of current ICH/FDA guidelines. Combined light exposure or individual light exposure with an automatic light cut-off system after exposure is achieved. Shelf-mounted light tubes provide direct uninterrupted light to test sample interior illumination. UV florescent Light. UV Tube light.