Heavy Duty Light Meter à¤Ã×èͧÇÑ´áʧ HD450 Meets ANSI and IEC61672-1 Type 2 standards • HD450 Datalogger model automatically stores up to 16,000 readings or manually store/recall up to 99 readings • Wide range to 4,000Fc or 40,000 Lux • Cosine and color corrected measurements • Utilizes precision silicon photo diode and spectral response filter • Peak mode (10μS) captures highest reading • Relative mode indicates change in light levels • Min/Max and Data Hold • Large backlit LCD display with 40-segment bar graph • Heavy Duty rugged double molded housing • Built-in USB port • Includes light sensor with 3ft (1m) cable and protective cover, Windows® compatible software with USB cable, hard carrying case, and 9V battery