The operating principle of incandescent lamps is that the electric current will pass through the lamp holder to the filament, causing it to heat up and emit light. According to calculations, only 10% of the energy is used to convert into light, so the luminous efficiency is low, the remaining 90% of the energy is converted into heat and radiated outside the bulb shell.
- LED lamps do not lose excess energy to heat and burn the filament to emit light like incandescent lamps. LED lamps operate on the principle of emitting light from diodes. The heat generated in this process is very small. Only a small current (direct current) is needed for the interaction to occur. Therefore, LED lamps are the most energy-saving lamps today.