Strength of a light source measured at the source.
Power draw of the lamp.
Amount of usable light from a light source.
Amount of light per square foot of a work surface.
Number of candles that would shine the same amount of light as the light source being measured.
Strength of the light measured one foot from the light source.
Amount of light shed in one square foot of area measured at a distance from the light source.
Number of feet away from a light source you are measuring.
Lumens per square foot.
Lumens per square meter.
Candles per square foot.
Candles per square meter.
The amount of light measured on the front of a computer monitor
The amount of light measured at the front of a rack aisle
The amount of light measured on a factory wall
The amount of light measured on a factory floor