Yes, LED lights produce heat. However, this heat is only a fraction of what incandescent or halogen bulbs produce. LED lights are also more efficient using that energy. The heat at which a LED light will operate depends on the temperature of the room and the fixture you place it in.

The heat development of LED lamps is significantly lower than that of old incandescent lamps. Incandescent lamps generate only about 5% light from the energy fed in, the remaining 95% is converted into heat. With current LED lamps, things look much better. Here about 40% of the used energy is converted into visible light and only 60% into heat.

High power light-emitting diodes (LEDs) can use 350 milliwatts or more in a single LED. Most of the electricity in an LED becomes heat rather than light (about 70% heat and 30% light). If this heat is not removed, the LEDs run at high temperatures, which not only lowers their efficiency, but also makes the LED less reliable.