The winds of change have been blowing through lighting: existing metrics are being challenged, while new metrics for the non-visual effects on the human circadian system are now entering the mix. Jill Entwistle looks at the complexities beneath the apparently simple proposition of lighting a space
LAST YEAR four leading lighting academics, including two past presidents of the Society of Light and Lighting, issued a manifesto. ‘We believe interior lighting, as generally practised, is ripe for a paradigm shift,’ they said in their introduction.
Teir manifesto is particularly relevant to the workplace, but the principles also apply more broadly. Teir contention is that current thinking in some circles, focused as it is on lighting horizontal surfaces – the desk – is based on outmoded ideas and has been overtaken by technology-driven changes.
Te screens that have superseded paper, for instance, are vertically orientated and self-luminous. ‘Tis means
