... colorimeters at the same time. LED CFL lumen test system- light lumen demo caseLT-SM999 Spectroradiometer ... 24hrs/day), testing time, testing temperature.3. Equiped with different converter for E27, E14, B15, B22, ... MR16, GU10, G9.Could test different lamps with different bases.lumen demo case Features:1. Input ... hole of lamp installation is 14cm.4. With precise test data and competitive price.5. ...