... efficiency. - Measuring intensities of illumination in unit of Lux or Foot-candle. - Silicon photodiode and filter. Cosine angular corrected. APPLICATION: Warehouses ... ,1uW,0.01mW0.01,0.1,1,10,100 Lux0.01,0.1,1,10 Foot-candel0.01,0.1,1 W/m2 ...