A light emitting diode is a semiconductor that emits light when traversed by an electric current, thus the light is not produced by means of an electric filament or a gas , but a electronic component. This feature explains the many advantages of LED: LEDs are very strong, very effective (they convert very little power into heat), long life and do not contain mercury unlike most of the current sources.

Heat

An incandescent bulb uses only 10% of every watt of light, while the rest is heat. But LED technology is totally the opposite, 90% of the electricity consumed is converted into light energy while only 10% into heat, resulting in a desired energy savings.

Color Temperature

The data of the color temperature refers only to the color of light, and not its spectral composition , which is essential for color reproduction. Thus, two light sources can have properties very similar colors and both have a very different color.

The color rendering index (CRI or Ra) has the ability to reproduce the colors of objects illuminated by a light source. The CRI provides an indication of the ability of the light source to reproduce the colors in relation to the reproduction light provided by a standard reference standard.

LED Colors: 2700k - 3800k - 7000K

CRI>80

Graphic representation of luminous quantities

The luminous flux produced by a source of light is the total amount of light emitted in a second or radiated in all directions . The unit of luminous flux is the lumen (lm).

If we represent the luminous intensity in candelas ( lm / radian stereo) from a source of light in different directions in space , we have the photometric curve or curve of light distribution .

Conversion table for various lighting technologies