Lighting definitions

LUMEN
Light output
Output of luminous flux. The higher the value, the more light output.

CRI Ra
Colour rendering index
The higher the CRI (on a scale 0 - 100), the more natural the colours appear.
Natural outdoor light has a CRI of 100Ra. Use our PremiumWhite modules for the highest possible CRI value available.

CCT
Correlated Colour Temperature
CCT is defined in degrees Kelvin (K). For example: 2700K warm-light, 4000K neutral-white and 5700K daylight.

UGR
Unified Glare Rating
The Unified Glare Rating (UGR) is an international index that quantifies discomfort glare.
The lower the value, the less discomfort users will experience. This is especially important in office projects.