• Standard Colours (White, Warm White, etc.) provide only moderate colour rendering.
• Tri-phosphor and Multi-phosphor (Polylux XL) give good to excellent colour rendering.

Colour Selection Rules of Thumb
For low lighting levels use warm sources (Polylux XL 827 or 830). For higher lighting levels use cooler colours (Polylux XL 835 or 840).

For general commercial applications Polylux XL should be recommended in place of standard colours because of the combined advantages of longer life, better colour rendering and lamp efficacy.

Colour Rendering Rules of Thumb
For good colour and the best efficacy, Polylux XL should be the first choice. For very good colour use Polylux Deluxe lamps.

For applications where extremely good colour rendering is the overriding factor, such as matching of photographic prints, fabrics and other dyed goods, only fluorescent lamps Northlight (colour 55) and Artificial Daylight (AD) can be used. These lamps have poor light output and have to be changed frequently as light output and light quality reduces rapidly. Only Artificial Daylight meets all the requirements of BS950 (Colour Matching).

Colour Application Notes
Choose paint, furniture and fabrics under the light source to be used in the space.
High intensity discharge lamps can be matched to some fluorescent lamp colours.

• Multi-Vapor and Kolorarc - Polylux XL 840 and Cool White.
• Halarc - Polylux 835.
• Arcstream - Polylux XL 830 and 840.

For high ceiling stores, sports arenas and industrial areas use Multi-Vapor, Kolorarc or Sportlight lamps.

For general floodlighting, security lighting and car parks where colour is not critical use Lucalox as such lighting operates for long periods and efficacy is important to keep down running costs.