Extech EA33 Easyview Light Meter with Memory.

EasyView Big Digit Light Meter with Memory
This compact and ruggedly designed meter has a wide measurement range to 99,990 Foot Candles in five ranges and 999,990 Lux in five ranges with 0.001 Fc/0.01 Lux resolution. 

Additional Features
Store and Recall up to 50 measurements with relative or real time clock stamp, Luminous intensity (candela) calculation, a ripple function that excludes stray light from the primary light source measurement, multipoint average function, timed hold, relative measurement in absolute value or percent deviation, comparator function with high/low alarms, and auto power off with disable.

What Is a Light Meter?
A light meter measures the amount of visible light, also known as illumination, in a given area. For many meter brands, including Extech, illumination is expressed in units of measure called Lux (for metric) and foot-candles (used in the US). To use an Extech light meter, the sensor is placed on a tabletop or other surface in the area to be measured and the light level reading is indicated on the meter's display.