With the fashion for everyone to dig down rather than build up to create their man caves, spas or subterranean pools, it seems that natural light’s going to be in short supply. Unless, of course, you’ve built in the capacity to install a CoeLux artificial rooflight, illuminating your bunkers in a quite uncanny, naturalistic light. A panel and light create the effect of the infinite space of the sky by placing an LED that mimics sunlight 1m above a flat screen of nanotechnology particles, which emulate the Rayleigh scattering of the earth’s atmosphere. Available in three settings – ‘Tropics’, ‘Mediterranean’ and ‘Northern Europe’ – the only questions remaining are: ‘How much, and what kind of blue do you do?’