By Isabelle Rodney, CNN (CNN) — The turquoise water of Hōnaunau Bay in Hawaii, an area popular with snorkelers and divers, is teeming with spiny creatures that threaten to push the coral reef ...

The LED, or light-emitting diode, is very unlikely to fail, and if it does, it goes out slowly over years. Instead, it's the other electrical bits in LED bulbs that fail and cut off the bulb's light.