Power factor and efficiency

In the field of electrical engineering, the power factor φ expresses the ratio of real power P to apparent power S (see formula):

λ = P / S

Real power P is a physical value that constitutes the amount of transferred power. Apparent power S is a product of effective voltage and effective current, and thus more of an "artificial" concept that serves to specify the loads acting on means of transfer (e.g. conductors). As a result, the power factor λ is always positive and ≤ 1. It defines the degree to which power is converted into usable energy in a device.

In accordance with the IEC 62384 performance standard, the power factor for LED drivers is displayed on the type label as follows:

λ = 0.95

The efficiency of a device is defined using its power efficiency factor η. The power efficiency factor of a device is defined as the output power Pout divided by the input power Pin. The measuring procedure for LED drivers is defined in the IEC 62442-3 standard, which is currently under preparation. High-quality devices feature a power efficiency factor greater than 85% (η ≥ 0.85).

Our partner from the USA has been developing and producing high-quality semiconductor for about 30 years. CREE has been our partner for an extensive range of LEDs since 2004. The product range includes a wide range of high brightness, high power LEDs offered in SMD as well as THT and COB technology.

Your contact: Olaf Naumann

Phone +49 (0)2842 980-211
Olaf.Naumann@vossloh-schwabe.com

Nichia from Japan, the inventor of the white LEDs, has been one of the partners of VS since 1995. The product range includes a comprehensive range of high brightness and high power LEDs, as well as a UV LED product range covering all power classes.

Your contact: Ulf Hilsenberg

Phone +49 2842 980-213
Ulf.Hilsenberg@vossloh-schwabe.com

To complement our LED range, we offer secondary optics and reflectors from our partners Carclo (www.carclo.com) and LEDiL (www.ledil.com). The product range includes a large selection of optics, optic holders and reflectors made of PMMA and silicone. We specifically stock up on a wide range of products to match the LEDs from CREE and Nichia we offer.




We develop and produce a variety of LED optics for shop, office, hall and street lighting for you. Optics are available in various designs (round, square, linear) made of high-quality materials (PMMA, silicone) and with any beam angles (narrow/wide, asymmetrical or combined).

Our partner from the USA has been developing and producing high-quality semiconductor for about 30 years. CREE has been our partner for an extensive range of LEDs since 2004. The product range includes a wide range of high brightness, high power LEDs offered in SMD as well as THT and COB technology.

Your contact: Olaf Naumann

Phone +49 (0)2842 980-211
Olaf.Naumann@vossloh-schwabe.com


Nichia from Japan, the inventor of the white LEDs, has been one of the partners of VS since 1995. The product range includes a comprehensive range of high brightness and high power LEDs, as well as a UV LED product range covering all power classes.

Your contact: Ulf Hilsenberg

Phone +49 2842 980-213
Ulf.Hilsenberg@vossloh-schwabe.com