LED Engin, Inc., demonstrated its Generation 3.0, tunable white light engine at Lightfair. LuxiTune Generation 3.0 features a 2200 lumen emitter, equivalent to a 120W halogen lamp. The light engine offers smooth halogen-style dimming from 1600K to 3000K and Correlated Color Temperature (CCT) tuning between 2100K and 4300K. Both tuning curves track the black body curve closely and light intensity (flux) is adjustable from 100% to less than 0.5%. With the company’s complementary secondary optic, luminous efficacy is 63 lumens/W at steady-state temperature. The Color Rendering Index (CRI) is 90 at full intensity, and the CRI maintains an average of 85 as the LED is dimmed.
The DALI and DMX compatible light engine provides flicker-free operation with industry-standard analog 0-10V dimmers. According to LED Engin, the light engine’s self-learning mode eliminates known issues related to varying voltage drops on long and short cables when multiple lamps are connected to one dimmer. DMX control can switch between CCT tune and halogen dim modes. LuxiTune employs a compact, single emitter to provide warm, soft tones of dimmed light. Throughout the dimming range, LuxiTune maintains color quality and consistency within 3 Standard Deviation Color Matching (SDCM). The multi-channel emitter platform creates more vibrant colors without some of the hue changes experienced with simpler two-color systems. Smart feedback control ensures color and flux stability over the product’s lifetime and eliminates the known effects of varying light output over temperature and time from different color dies. Furthermore, the light engine has no perceptible flickering effects in the 100Hz to 200Hz range.
Secondary optics measuring 84mm diameter are available in 24°, 34° and 45° beam angles for compact lighting fixtures. A driver board is mounted remotely, separated from the LED MCPCB in the LuxiTune 3.0. The company points out that this is a particularly useful feature in recessed metal box downlights. A separate emitter allows easier integration into swivel features, and heat from the driver board does not increase the temperature of the LED with the separate emitter. So, reliability and operating life are improved.
LED Engin also offers a 1100 lumen version of the latest LuxiTune, equivalent to a 60W halogen lamp. LuxiTune Generation 3.0 is sampling to key customers now, with volume production ramping in the third quarter of 2014.