Lux to watts calculator November 10, 2022 by atmiya25 Enter illuminance in lux: lx Select light source: — select light source —Tungsten incandescent light bulbHalogen lampFluorescent lampLED lampMetal halide lampHigh pressure sodium vapor lampLow pressure sodium vapor lampMercury vapor lamp Or enter luminous efficacy in lumens per watt: lm/W Enter surface area: ft²m² Or enter spherical radius: ftm Power result in watts: W See also Percentage Calculator (%)