... system includes a special constant current source, a LCD display module, and an advanced fast spectral analysis module. ZWL-600 ... (expandable), luminous intensity 0-300 cd),color parameters(color temperature 1300-25000 K, wavelength 380-780 nm (UV, Ir ... Advantage: online printing and storage;These systems comply with CIE standard. ZWL-600 LED lumen, angle and color temperature measurement system