... : Characteristics:High quality integrating spheres for LED and LED lamps only, nice streamlined shape design,high diffuse reflection, and ... to identify or compare the quality of LED lamps,fluorescent lamps, halogentor incandescent lamps,or appliances from AC 100 to 277V ... , E14, B15, B22, GU10, G9.Could test different lamps with different bases.Input voltage:AC100V-250V. The input voltage is ...