Milwaukee Instruments SM700 Lux meter light meter MW 700, MW700
LUX is a unit of measurement of lumens per square meter, sometimes (and incorrectly) used synonymously with light intensity. Instead, LUX is the measurement of apparent intensity, as viewed by the human eye, per square meter. Because the human eye weights certain parts of the spectrum (certain wavelengths) as brighter than others, two light sources can have the same intensity but a different LUX. Hobbyists that use LUX as a unit of measurement would typically keep their reef aquarium or freshwater planted aquarium light intensity between (3000-14,000 LUX), depending on how heavily stocked it is with soft corals, hard corals or plants.