Healthy Lighting

"I didn't expect it to cost that much". We hear this often. And it is an entirely reasonable reaction because, for most of our lives, we have viewed a lightbulb as a disposable commodity that costs two dollars at the hardware store.

For millions of years, the human species had a very reliable lighting schedule: bright, blue-rich light from the sun during the day, and soft, warm, amber light from fire at night.