Posts Tagged ‘animal care’

What is the visible light spectrum and who is it visible to?

Friday, September 2nd, 2011

Many of us have learnt at school that the visible light spectrum is made up of seven colours ranging from red to violet. The colours being the same as the rainbows – red, orange, yellow, green, blue, indigo, and violet.


You may also have learnt that the visible section is only a tiny portion of the full electro-magnetic spectrum, and this spectrum includes Infra-red (next to Red) and Ultra-violet (next to Violet). (more…)

Full-Spectrum Light (issue 33)

Thursday, August 4th, 2011

Around the world different people are talking about how they use full-spectrum lighting in their day-to-day lives. We feature some of the best here.


Night and Day, and Day and Night
Today will be a beautiful, sunny day (even by non-Portland standards) — and yet my curtains are closed and I’m typing by my full-spectrum light because, well, it gets hot when the sun blazes through a 10′ by 15′ window bank.