The Triplett Model LT75 Digital Light Meter Lux to Fc measures light intensity (up to 40k Foot candles/400k Lux) and verify OSHA safety requirements from fluorescent, metal halide, high‐ pressure sodium, and incandescent sources found in factories, parking lots, schools, offices, transportation lines, warehouses, hospitals, schools, and many other environments. It features a silicon photodiode sensor with spectral response filter, Zero adjust, Min/Max/Average function recalls highest, lowest and average readings, Data Hold freezes the reading on the display for easy viewing, low battery indicator, and Auto power off with disable. Includes 2 AAA batteries and carrying case.