Illuminants describe different spectral distribution curves of light sources. In colour measurement, they enable to reconstruct different illumination characteristics.


  • Illuminant A: light bulb (2856 K)
  • Illuminant DXX: Natural daylight (D = daylight, XX = colour temperature)
  • Illuminant D65: Average noon daylight under cloudy sky (6500 K)
  • Illuminant C: Artificial daylight simulated by light bulbs with filters
  • Illuminant E: No real light source, energetic equivalence point
  • Illuminant F: Fluorescent lamp

UK & Ireland Ltd.

+44 151 355 6070

Send email

Mastercard and VISA accepted
Express payment with
Visa or Mastercard

Micro-Epsilon UK Ltd
No.1 Shorelines Building
Shore Road
CH41 1AU
(for Sat Nav use CH41 1AW)
+44 151 355 6070
+44 151 355 6075