How do LED lights differ from fluorescent lights?

LEDs emit light by concentrating wavelengths of light; fluorescent bulbs emit light because of heat.
LEDs emit light because of energized solids; fluorescent bulbs emit light because UV light interacts with a phosphor coating.
LEDs emit light because of heat; fluorescent bulbs emit light because of energized solids.
LEDs emit light because UV light interacts with a phosphor coating; fluorescent bulbs emit light by concentrating wavelengths of light.