Luxmètre Numérique Amprobe LM-200 LED Dual-scale meter measures light output from LED light sources up to 400,000 lumens per square meter (lux) or 40,000 footcandles (fc) Silicon diode sensor and filter are designed for indoor use at altitudes below 2,000 meters Built-in memory stores up to 99 records, data hold freezes readings on the display, maximum recording displays the highest reading, and angled light cosine correction corrects for angled light Complies with Japanese Industrial Standard (JIS) C1609:1993 and CNS 5119 general A-class specifications, and European Community Directives: 89/336/EEC (Electromagnetic Compatibility) and 73/23/EEC (Low Voltage) as amended by 93/68/EEC (CE Marking) Powered by a 9V battery (included), and includes a 1.5-meter wire for positioning light sensor, and a protective sensor cap