The Basics of LED

Due to technological development, new concepts have emerged, which we briefly summarize below:

Lumen (lm)
Is the unit of luminous flux which describes the amount of light emitted in all directions and characterizes the brightness of a lamp. LED requires much less energy than standard bulbs to produce the same amount of light. Therefore, in addition, the brightness of the lamp is shown in units of lumens (lm).

Light Colour, Kelvin (K)
Kelvin is the colour temperature of the unit, which describes the colour of light. It is a basic distinction between warm white (less than 3,300 K), neutral white (3300-5300 K) and cool white (5,300 K).

Colour Rendering Index (Ra)
Provides information on how naturally colours are rendered in the light of the LED. Ra values greater than 80 indicate good to very good color rendering properties.

Lifetime according to the EU Ecodesign Regulation, valid from March 2014.
Stipulates that at least 90% of any LED bulb model must still shine after 6000 hours and deliver at least 80% of its original brightness.
Switching durability: ≥ 15,000 cycles when the rated LED lifetime is ≥ 30,000 hours. In other words the switching durability must be at least half of the lighting hours.
Early failure rate: less than 5% after 1000 hours.

The Advantages of LED:
- No UV-or IR-radiation
- Full light force immediately after switching ON
- Low power consumption and low heat generation
- Long lifetime