Ostar Stage LEDs from Osram Opto Semiconductors offer high luminance of 48 million candelas per square metre and tunable colour tones from cold white to warm white.
Combined with their extremely low-profile design and glass cover with antireflective coating, they provide the basis for compact spotlights with an extremely narrow beam. This LED is ideal for use in moving head spotlights on stage, for booth lighting at trade fairs and for architectural lighting.
The special feature of the new LED is its tunable white light color. Two warm-white and two cold-white chips, arranged diagonally in the package, not only enable colors to be mixed perfectly at component level but also allow correlated colour temperatures of 2700K to 10,000K to be produced with appropriate control. The LED achieves a high Colour Rendering Index of 94 for warm white; for cold white the figure is 74. Its etendue—the emission angle/area ratio of the emitting light surface to the projected light surface) is retained in conjunction with external optics, enabling a very narrow beam of light (+/- 9°) to be produced. This beam is smaller by factor 2 than for spotlights based on plastic-encapsulated LEDs. Consequently, the luminance of the spotlight is greater by factor 2.
All the versions of the Ostar Stage are based on the 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. The LED is therefore ideal for use with external optics. In continuous operation (DC) the chips can handle an operating current of up to 900 mA. This gives maximum values of 390 Lm in cold white (10,000°K).
The LEDs can be used in spotlights of any size, from small stage spots to large moving heads.
