We can't talk about morning sunlight and improved sleep hygiene without first addressing our circadian rhythm. This is the body's 24-hour sleep-wake cycle. It naturally responds to light and darkness, ...

Learn how to use, choose and shop for grow lights -- whether you're tending to houseplants or starting your own seeds.

Invest in a light therapy lamp: If you have limited access to natural sunlight or live in a region with overcast weather, consider a light therapy device that mimics the spectrum of natural light.

His team’s innovation, known as GPDT (Green Products Photodynamic Technology), uses plant-derived compounds activated by natural sunlight to ... in the visible spectrum (400–700 nm).