We explain the 4 most common LED technologies.
LED (Light Emitting Diodes) are getting more and more important since the ban of the incandescent light bulb. An LED is a light-emitting semiconductor device (also called diode). Electric current flows through the diode and emits light. This can be done through infrared radiation or ultraviolet radiation which depends on the semiconductor material that is being used and the added atoms from the production of corresponding wavelengths.
The technology is constantly evolving. The manufacturer CREE already promotes LED chips that generate up to to 400lm / watts at a minimum pack size! What should be kept in mind: Lumen values are not everything if one wants to reasonably look at the topic LED. Of course radiation angle, color rendering index, light color and light intensity (cd) also play key roles. This is just a short explanation which LED chips are currently being used in the lighting industry.