RADEX LUPIN Professional testing and calibration of monitors, Incandescent light bulbs and LED. Light Meter, Pulse meter and Lucimeter. Determines quality of household lamps, bulbs and monitors. RadexLight Software allows PC connection and data transfer (downloadable) Helps to prevent strained eyes and fatigue from bad monitors and bulbs. Spectral sensitivity identical to a human eye (very important!). Measures Light, Brightness and Flicker ratio.