Principle of LED Light Radiation
Light is a form of energy that can be propagated from one object to another without the need for any other medium. This energy is often referred to as radiation, which means that energy travels in all directions from the energy source along the line (within the same medium).
The light wave of visible light occupies only a small space, and its wavelength range is between 380 and 770nm. It contains seven colors including purple, indigo, blue, green, yellow, orange and red which human eyes can distinguish.
The luminescence of the object has a thermal light and a cold light, hot light is also called thermal radiation. Its luminous principle refers to the light emitted by matter at high temperature just like incandescent lamps, it emits a white light when tungsten is heated to a high temperature in a vacuum or an inert gas. The luminescence principle of cold light is the light emitted by some energy at a lower temperature. An electron from an atom is stimulated from the ground state to a higher energy state in the cold light. Since this state is unstable, the electron is usually released in the form of light and returns to the ground state.
Since this luminescence process does not accompany the heating of the object, this form of light is called cold light. Cold light of the practice, has bioluminescent- fireflies, chemiluminescence- phosphors, cathode ray emitting- fluorescent lamp, metal halide lamp, electrodeless lamp and electroluminescent- LEDs( it can be produced into LED street lamp, high lumen flood light, etc).