... voltage, wattage, color temperature, luminous flux, luminous efficiency3. With different base: E27, E14, B15, B22, GU10, G9 ... , It could test different lamps with different bases.4. Test steps: Keep the tested ... . testing time is only about 10 seconds.6. The size of Spectroradiometer is very tiny ... the total weight is light(alumimum, 6.5Kgs only)7. With precise test data and competitive price. ...