Product Description The Lux Meter is a specialised instrumentation measuring luminosity, brightness. widely used in electro-optical sources, research teaching, metallurgy building, industry inspection as well as agriculture researching and illumination control. Product Parameters Measuring range 0~50,000 Lux 0~5,000 FC Resolution 1 Accuracy ±5%n + 5d Operating Conditions  Temperature : 0~50°C Humidity: below 90% RH Power Supply 4x1.5v Um-4 Battery Size Main Unit: 140x70x30 mm Probe: 53x53x17 mm Weight 130 g(Not including batteries)