... great for those who test PV modules or arrays in the field. Illumination Features: - According to JISC1609 ... CIE luminous spectral efficiency. - Measuring intensities of illumination in unit of Lux or Foot-candle. - Silicon ... photodiode and filter. Cosine angular corrected. APPLICATION: Warehouses, factories, office buildings, restaurants, schools, library, hospitals, photographic, video, parking ...