They are considered energy-saving and are meant to substitute the older incandescent light bulbs that existed prior to these; however, CFL’s emit more UV light than incandescent bulbs did. Fluorescent ...

The invisible UV is converted to visible light by a coating on the inside of the tube. Another distinguishing feature of CFLs ...

The carbon rods emitted carbon monoxide and ultraviolet light. They were extremely harsh and bright, and the rods burned up quickly. Everyone knew a better light bulb would be a winner ...