LED light-emitting principle is to convert electrical energy into light. Currently, one of the biggest obstacle to design a bright and efficient LED lights, is to increase the output power of the LED lights but its efficiency. MIT researchers explained that the results of their research greatly reduces the applied voltage. According to calculations, when the voltage reduced to half of the input power is reduced by a factor of 4, and the light emitted power and voltage consistent, also reached the half. In other words, when the decline in output power LED light-emitting rate is on the rise.

In the experiment, the researchers reduced the input power of the LED(led emergency lighting), only 30 Piva, and measuring the amount of light output up to 69 Piva, efficiency up to 230%. The same physical mechanism acting on any LED outer applied voltage role, there is a certain probability of electrons and holes to produce photons. The researchers did not like other studies attempting to increase this probability, but to use a small amount of waste heat emitted by the equipment atomic lattice vibrations produce more power.

The process allows the use of waste heat light LED cool slightly, and its operation is similar to a thermoelectric cooler. Although under ambient conditions, the cooling is not sufficient to provide a practical temperature, but it may be used to design does not produce heat lamp. As a heat pump, the device may contribute to the solid-state cooling applications, and even generating equipment.

Theoretically, this strategy of low pressure can be generated at a low voltage in any efficient photon researchers hope that this technique can provide a new test of the energy maximum electromagnetic wave communication method. Although this is interesting in science, but also not immediately procure the ultra-efficient LED(rechargeable led light) commercial, demonstration projects can only generate a small amount of light with very low input power.