A professional LED light meter specifically calibrated relative spectral sensitivity wavelength of 550mm to the JIS standard C 1609-1993 measuring corrected LED day white light spectrum. With a user selectable light source it can also measure normal light sources. Wide measuring range up to 400, 000 Lux, large LCD display and user-selectable measuring units. For environmental monitoring, health & safety checks, and industrial applications.Measures both lux and footcandles (FC) , user selectable.Supplied with protective lens cap, soft carry pouch and battery.Range 40/400/4, 000/40, 000/400, 000 Lux, 40/400/4, 000/40, 000 FC.Resolution 0.1/1/10/100 Lux, 0.01/0.1/1/10 FC.Accuracy 3% of reading 10 digits.Power 4 x 1.5V AAA alkaline batteries (LR-3-4) .Dimensions 162 x 63 x 28mm.Weight 250g.Features:Range selection of 5 lux ranges and 4 FC ranges.Manual or auto ranging.Over range indication.Silicon photo diode sensor and LED spectral response filter.Fully cosine corrected.User selectable li