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How Are Lighting Levels Measured. One foot-candle is equivalent to one lumen per square foot. This provides a direct representative measurement of actual power for the project. Summarizing while light output is expressed in lumens light intensity is measured in terms of lumens per square meter or lux. Due to light pollution the night sky over many of our cities is hundreds of times brighter than a natural starlit sky.
Illuminance is the metric that is used to measure the light intensity within a space. How to Choose the Right Kelvin Color Temperature. It is typically expressed in cdm². Effectively it sits at the center of a sphere of radiated light which is why light units reference the steradian. A light source like the filament of an incandescent bulb emits light in all directions. Thus a foot-candle is equivalent to approximately 10 lux or 1057 lux.
Hold the photometer in the area that you want to measure the intensity of the light.
Illuminance is the metric that is used to measure the light intensity within a space. To measure light intensity use a handheld digital photometer or download an app on your smartphone. Light bulb color temperature is represented in the unit of absolute temperature Kelvin. A higher number of lumens are indicative of a brighter more intense light whereas a lower number of lumens represent dimmer more subdued lighting. One foot-candle is equivalent to one lumen per square foot. Summarizing while light output is expressed in lumens light intensity is measured in terms of lumens per square meter or lux.