Square white LEDs
25 January 2012
Opto-Electronics
OSRAM Opto Semiconductors’ new LED, the Oslon Square, is aimed at a wide range of possible uses, including designer luminaires for the home or office, retrofits and street lights. The LED is available in many different versions with different colour temperatures. It can be operated with different currents and its reflective package makes good use of the light to increase system efficiency in all versions.
The LED measures 3 x 3 mm, has a low thermal resistance of 4 to 3,8 K/W and is accommodated in a robust package which is suitable for outdoor use. The LED chip is enclosed by a reflective package that reflects light emitted at the side or at the back so that this light is usable. Light that is reflected back to the LED within a system – for example from a diffuser – can also be used in this way.
The Oslon Square EC is suitable for indoor applications in which a high quality of light is needed, for example in offices. With a colour temperature of 3000 K it provides a warm white light and also offers high colour stability over a wide viewing angle (120°). The CRI is at least 80. If the lighting needs to be particularly uniform, a ‘fine-bin’ order can be placed for this LED. At an operating current of 700 mA it achieves an efficiency above 90 lm/W and a luminous flux of 200 lm and more. At 350 mA its efficiency passes the 100 lm/W mark. The EC version is also suitable for retrofits.
The Oslon Square PC and UW are designed for outdoor applications, for example in street lighting. They can be operated at currents of 200 mA to 1,5 A, making them interesting for other applications such as downlights and spotlights. The LEDs produce a neutral white to cold white light with colour temperatures of 4000 K and 6000 K. At 130 lm/W from 350 mA they are even more efficient than the warm white version. With a CRI of at least 70 (4000 K) and 65 (6000 K) these LEDs combine good quality of light with high efficiency.
For more information contact Ryan Hunt, OSRAM Opto Semiconductors, +27 (0)79 525 1779, [email protected], www.osram.co.za
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