LEDs for downlights

27 June 2012 Opto-Electronics

Downlights provide high-quality background lighting in professional applications. These include shopping malls, offices, industrial buildings and high-end residential premises. The luminaires need a high luminous flux for their light to have the right effect. This is precisely what the new Soleriq series from OSRAM Opto Semiconductors was designed for.

Even at high application temperatures, the chip-on-board LEDs form the basis for highly efficient luminaires with a luminous flux of 1500 lm to 4500 lm. Only one Soleriq-E-LED is needed to give a luminaire enough light. The individual chips are all under the conversion layer, giving the impression of an homogeneous light emitting surface. This ensures a uniform colour and light appearance in the luminaire and even coupling into external light-guiding optics is very simple.

The light generated can be used with low optical losses, which in turn makes the LED lamps and luminaires more efficient. Typical LED benefits such as high energy efficiency and long lifetime can thus be enjoyed by the downlights.

The Soleriq E is available in two versions, covering the colour spectrum from 2700 to 6500 K. Even at a temperature of 85°C, which corresponds closely to the temperature in the application, the two LEDs offer an efficiency of 103 lm/W at 4000 K. At this temperature the larger Soleriq E 45 achieves a typical brightness of 4000 lm (rated current 880 mA), while the smaller Soleriq E 30 produces a lumen output of 2700 lm (at 600 mA).

Good colour homogeneity is achieved by the narrow white grouping of the Soleriq E, corresponding to a range of 4-step MacAdam ellipses. For solutions that need a particularly high level of colour homogeneity, grouping based on 2-step MacAdam ellipses is also available.

For more information contact Ryan Hunt, OSRAM Opto Semiconductors, +27 (0)79 525 1779, [email protected], www.osram.co.za

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