These light sources deliver the extremely high levels of "stability" and "repeatability" essential to calibrated light sources. These are available as an optimal set including a lamp, lamp housing and power supply, so that anyone can easily reproduce a highly stable light output. The L7810-02 xenon lamp light source is calibrated over a wide spectral range from 200 nm to 800 nm, while the L7820-02 deuterium lamp light source is calibrated in the UV range from 200 nm to 400 nm. Since we are certified as an ASNITE-Calibration laboratory, we are capable of calibrating spectral irradiance over a wide range from 200 nm to 800 nm (L7810-02).