The viewing angle of the LED is also a function of the LED chip type and the light splitting or scattering function of its epoxy resin shell. LEDs of different chips and packages will have different brightness values. If two LEDs have the same brightness value, the larger the luminous angle is, the greater the light output is.

In the process of electron transfer, the energy released by high brightness and low heat LED is mainly concentrated in the range of visible light. Unlike other tungsten filament bulbs, most of its electromagnetic energy is concentrated in the infrared region, which makes people feel very hot. That is to say, LED converts almost all electric energy into light energy, so LED is a high-efficient and low heat product.