The biggest difference is that the laser emits coherent light, while the LED only emits colored light. So the LED illuminates everything like a candle, while the laser emits a beam of light. Semiconductor blue laser pointer is a kind of laser similar to LED. A specific laser emits a specific wavelength. And there are so many lasers emitting visible and invisible spectra. Compared with LEDs, the emission spectrum is very narrow.

A laser 20000mw is a device that produces a coherently focused beam. But the LED is not focused, it has a diffuse laser pointer. It is used for flashlights. The laser produces a straight path of a high-intensity beam. The led is an omnidirectional light source. Laser lights are generally divided into industrial laser lights and entertainment laser lights. The principle of laser lights is to use YAG solid-state lasers, use krypton lamps and Nd: YAG crystal rods to generate laser beams, and form visible green light through frequency conversion. A computer is used to control the galvanometer to produce high-speed deflection to form beautiful characters or graphics.

Place the red laser pointer light in a high-rise or mountain-top scenic area, the beam shoots into the distance, and a bright green light appears in the sky, which is very dazzling. A laser show system with a special protection system developed for the outdoor environment. On the basis of the indoor performance system, plus a complete protection device, the laser light can adapt to the outdoor bad weather environment, and can automatically adjust its own temperature, humidity, etc. Environmental factors basically make the outdoor use environment of the laser light reach -40 to 50 degrees Celsius. It is used all-weather, using a self-control system and temporary manual control.