Circadian lighting — and biologically effective lighting more broadly — is an exciting frontier in the design industry with immense potential to improve occupants’ quality of life. These strategies ...

Simulating this cycle with artificial lighting is effective, as long as you are using the right effect for the time of day. Sunrise alarm clocks and SAD lamps are based on this principle.

UV wavelengths range from 100 to 400 nanometers — shorter in wavelength than the violet hues in visible light — and are invisible to the human eye. As wavelength shortens, photons of light ...

There are three main purposes for exterior lighting: to increase safety and visibility; create the right impression and atmosphere; and enhance security. Understanding the many important ...

UV lights come in a variety of different wavelengths, but not all are equally effective at disinfection. Researchers tested a number of commercially available lights to find the best.