A convenient and easy to use meter for measuring visable light. Unit switches between LUX and foot candle readings; LUX range: 200,2000,20000 with an accuracy of 3% of rdg. (5% at 20000), and FC range: 20,200,2000 with an accuracy of 3% of rdg. (5% at 2000.) Carrying case has separate compartment for processor and sensor. Uses one 9v battery.