Illuminants

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