is the source of life.

without it, all living things die.

The skin and retina are photon receptors that respond positively to Sunlight.

blocking Sunlight with blackout curtains in bedrooms, wearing long-sleeved tops, long pants, hats with visors, sunglasses, and application of sunscreen lotion could be doing more damage than good by reducing your vitamin D levels and significantly impacting your body's immune system.

Let there be light (but only during the daytime).