The energy class scale on energy labels for light sources has changed since September 1, 2021. You will no longer find energy class with "pluses" on our products, as the scale will now be at the lower end of the scale at the current state of technology. Our light sources are still keeping the same excellent energy efficiency, only the metrics have changed. To keep it simple, just stick to the fact, that the earlier the letter in the alphabet, the more energy efficient the product is.

Luminous flux. It’s denoted by the letter Φ and the unit is lumen (lm). Indicates the light energy that the source emits in 1 second. Thus, it is a form of power. The higher the value, the more light the light source emits.

The Colour Rendering Index (CRI) is an assessment of colour fidelity, when illuminated by a given source versus solar illumination. The Ra unit determines the fidelity of the colour perception to the human eye CRI, which is produced by the light source itself. The value of Ra is given as an integer from 0 to 100. Simply put, imagine the value of CRI Ra = 0 at which we do not recognize any colour, at the value of CRI Ra = 100 it is an ideal light source with a natural colour rendering. The lower the CRI value, the more the colours are faded and unnatural. On the contrary, the higher the number, the more vivid and natural things will look.

Warm white, cold white, daytime white. This is a verbal indication of colour temperature (in professional terms, chromaticity temperature). Basically, it can be said that warm white has a light colour of yellow, cold white has a bright white light. Daylight white is already a slightly bluish light. The nomenclature may differ from brand to brand. For easy orientation, we mark our light sources with sun icons of the appropriate colour.

Halogen, classic but only some LED lamps can normally be dimmed with common types of dimmers. The dimmability parameter means that the light source can be dimmed with conventional dimmers.