The Model LUX-01 digital light meter is able to measure the intensity of fluorescent, metal halide, high-pressure sodium, and incandescent light sources. The meter shows readings on a 3-1/2 digit LCD and can record measurement up to 200,000 lux and up to 20,000 foot-candles. The silicon photodiode sensor allows for use in high temperatures and has a strong angular correction for a highly accurate reading. It also includes a protective cap for the sensor, ensuring that the meter is always zero calibrated. Dwyer Instruments