For consistent and accurate readings when using Lovibond comparator instruments, it is important to use a constant light source for matching the sample with the glasses.

Standardised lighting unit, Daylight 2000: This mains-operated benchtop unit is corrected to good Northern daylight using a tungsten halogen lamp and a calibrated colour temperature-correction filter. It guarantees uniform lighting conditions for colour matching, allowing consistent and accurate readings when using Lovibond test discs.

Portable lighting units: The portable lighting unit is a constant light source powered by standard batteries for colour matching in any location.