The new Osram Ostar Stage LEDs from Osram Opto Semiconductors offer high luminance of 48 million candelas per square meter and tunable color tones from cold white to warm white. Combined with their low-profile design and glass cover with anti-reflective coating, they provide the basis for more compact spotlights with an extremely narrow beam. The Ostar Stage LEDs are targeted for use in moving head spotlights on stage, for booth lighting at trade fairs and for architectural lighting.
More details from Osram (http://www.osram-os.com):
The new Osram Ostar Stage LEDs from Osram Opto Semiconductors offer high luminance of 48 million candelas per square meter (Mcd/m²) and tunable color tones from cold white to warm white. Combined with their low-profile design and glass cover with anti-reflective coating, they provide the basis for more compact spotlights with an extremely narrow beam. The Ostar Stage LEDs are targeted for use in moving head spotlights on stage, for booth lighting at trade fairs and for architectural lighting.
The special feature of these new LEDs is their tunable white light color. Two warm-white and two cold-white chips, arranged diagonally in the package, enable colors to be mixed perfectly at the component level and also allow all white tones between color temperatures of 2700 Kelvin (K) (warm white) and 10,000 K (cold white) to be produced with precision control. The LEDs achieve a high color rendering index of 94 for warm white and 74 for cold white.
Instead of the usual lens, the Ostar Stage LEDs have a flat glass cover with an anti-reflective coating, designed for injecting the light into lens systems. Their etendue (the emission angle/area ratio of the emitting light surface to the projected light surface) in conjunction with external optics is retained, enabling a narrow beam of light (+/- 9°) to be produced. This beam is smaller by a factor of 2 compared to spotlights based on plastic-encapsulated LEDs. Consequently, the luminance of the spotlight is greater by a factor of 2.
Its glass cover gives the Osram Ostar Stage LEDs a lower profile than previous standard components. At 1.23 millimeters (mm), their height is only one quarter of the usual component height and their footprint is only 5.9 mm x 4.8 mm. This enables the production of compact spotlights.
All the versions of the Osram Ostar Stage LED are based on the Osram Ostar SMT platform and are suitable for standard solder processes. The chips are fabricated in state-of-the-art thin-film technology so that almost all the light produced internally is emitted at the top. This makes the LEDs designed for use with external optics.
In continuous operation (DC), the chips can handle an operating current of up to 900 mA. This delivers maximum values of 390 lumens (lm) in cold white (10,000 K) and 210 lm in warm white (2700 K). At a typical value of 1.8 K/W, the thermal resistance is low, eliminating the problem of heat removal. In constant use, the LEDs will last for more than 50,000 hours, giving the moving heads and architectural fixtures a long life.
These LEDs can be used in spotlights of any size, from small stage spots to large moving heads.
