For example, replacing prismatic lens fixtures with efficient deep-cell parabolic fixtures can minimize reflected glare. Manufacturers or retailers can provide you with fixture efficiencies. 30 fc For more information . . A lumen is a measure of light output from a lamp. All lamps are rated in lumens.
Illumination is the distribution of light on a horizontal surface.
One footcandle of illumination is a lumen of light distributed over a 1-square foot area.