Light is

Ever since we crawled out of that primordial slime, that’s been our unifying cry, “More light.”  Sunlight.  Torchlight.  Candlelight.  Neon, incandescent lights that banish the darkness from our caves to illuminate our roads, the insides of our refrigerators.  Big floods for the night games at Soldier’s Field.  Little tiny flashlights for those books we read under the covers when we’re supposed to be asleep.  Light is more than watts and footcandles.  Light is metaphor.  Light is knowledge, light is life, light is light.  ~Diane Frolov and Andrew Schneider