Measuring Range: 0 to 100000 Lux; Resolution: 1 Lux for < 2000, 10 Lux for 20000, 100 Lux for < 100000 Spectrum meets C.I.E. standard, sensor cosine correction factor meets standard Wide range measurement both for Lux & Foot Candle units Four lighting type selection: Tungsten, Fluorescent, Sodium, Mercury Large LCD display with data hold. Records Maximum, Minimum and Average readings. This digital lux meter measures 0 to 100000 Lux with a resolution of 1 Lux for < 2000, 10 Lux for 20000, 100 Lux for < 10000. Spectrum meets C.I.E. standard, sensor cosine correction factor meets standard. Wide range measurement both for Lux & Foot Candle units. Four lighting type selection: Tungsten, Fluorescent, Sodium, Mercury. Large LCD display with data hold. Records Maximum, Minimum and Average readings. Sampling Time: Approx. 0.4 sec. Powered by one 9v battery (not included). Features a separate light sensor allowing the user to measure the light at an optimum position.Product Dimensions (L x W x H): 3.1" x 1.5" x 7.3" (185 x 78 x 38 MM)Product Weight: 0.77 LB