As the usage of incandescents dimmed, two new types of bulbs rose in popularity: LED (light—emitting diode) and CFL (compact ...

The ultimate goal for LED-based white lighting is to replace all incandescent bulbs and compact fluorescent lamps to provide an energy-efficient and long-lasting option for everyday use.

In addition to sunlight, ultraviolet rays are also given off by several different forms of indoor lighting, including compact fluorescent lamps (CFL’s). CFL’s are commonly long, cylinder shaped and ...