Illumination probe FX-100 is designed for accurate illumination measurements of traffic, work and living areas, following physiological perception of the human eye. This spectral-sensitivity model is followed by cosine - corrected sensor in the range of error <5 %. Measuring range is selected automatically in co-ordinance to illumination. The probe is connected to the computer via a serial interface for power and data display or logging. Dedicated application keeps measurement statistics and plots polar illumination charts.