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How to measure light intensity
Understand photometers that measure lux and foot-candles.
These are units that describe the intensity of light on a surface, or. Photometers that measure this are usually what people are looking for when they want to set up a photo shoot, or test whether a room is too bright or too dim.
Some light meters are specialized for different types of lighting. For instance, one may produce more accurate results when used to measure sodium lighting.