Tunable CRI 90 white LED for black body dimming from 3000K to 1800K

April 19, 2013 // By Graham Prophet
LED Engin's LuxiTune light engine output warm colour dimming in a compact and efficient package with a single emitter, maintaining colour quality and 3 SDCM consistency over dimming range and service life.

LED Engin, maker of high-lumen density LED products, has announced the LuxiTune, an intelligent, compact, single emitter light engine that delivers directional light with halogen-style dimming, tracking the black body curve from 3000K down to1800K. Luminous flux is 1100 lumens, equivalent to a 60W halogen lamp. Luminous efficacy is 63 lumens per Watt hot and including the secondary optic, far higher than that of rival products that utilise multiple emitters and reflectors. At full intensity, colour rendering index (CRI) is 90 and LuxiTune maintains a CRI average of 85 and R9 red content of 70 as it dims. With a diameter of 50mm, LuxiTune makes it quick and easy to create a compact lighting fixture that works with standard 0-10V dimmers or via a DMX interface.

The LuxiTune light engine comprises a 12-die, compact single emitter with intelligent control circuit and complementary TIR optic. The dice are matched to within 3 MacAdam ellipses (SDCM) and dimming tracks the black body curve to within three SDCM, producing consistent, natural light across the full dimming and CCT range. The multi-layer ceramic substrate minimises the package thermal resistance and provides an almost stress-free environment for the chips providing effective heat dissipation and maximum light emission. These features ensure that colour point stability is maintained throughout the product’s long service life. Optics are available in 24°, 32° and 45° beam angles. The lenses give uniformity over angle, maximise lumens in the beam while minimising glare and produce a gentle roll-off profile at the beam edges.

President and CEO of LED Engin, David Tahmassebi, comments, “Our customers in the hospitality and high-end residential sectors have been eager for an LED-based lighting solution that tunes along the black-body [curve] as it dims while leveraging our strengths in lumen density and lux-on-target performance. LuxiTune [is] a professional-grade replacement for halogen downlights where dimming is required. Lighting designers who love the benefits of LED but also desire the