... 2. Based on all digital integral Lux, photometric and colorimetric measurement Digital Lux Meter is based on all digital integral lux, photometric and ... Illuminance measurement: (test condition: vertical) • Relative spectral sensitivity error of digital sensor: f1<±5.5% • Dynamic range: 0.1-50,000 ... temperature etc. for incandescent lamp, halogen lamp, CFL, HID, LED, LCD screen Digital Lux Meter