Posted By Malcolm Hogarth Forgive my ignorance but what do people mean when they quote 'CAT 2 Lighting' at me? This is to do with lighting levels in offices. I normally go along the lines of 'suitable and sufficient'etc as per the Workplace Regs, and lighting levels in terms of 300 to 500 lux.

Posted By Stuart Nagle Further to fat's posting, I think the angle should be 65 degrees and not 30 (to the azmuth) for what was formerly called Cat II lighting. CIBSE have removed the Categories from their latest (2002) update of the definitive guide to lighting, namely CIBSE Guide 3 - Visual Environment for DSE, due to designers and specifiers wrongly assuming that Cat II was always right for DSE work - it is not. This guide is also referred to by HSE in their publication HSG38 Lighting at Work (2002 latest update) which is a good guide for most practitioners needing advice on lighting risk assessment, luminance and design for most areas of the workplace. Both docs are available for download to subscribers of TIONESTOP Technical Indices or Barbour Index in PDF format. Regards... Stuart