18 February 2014

Lumileds launches LUXEON Rebel ES Lime emitters with 200lm/W efficacy for tunable white light.

Philips Lumileds of San Jose, CA, USA says that Lime, the newest addition to its LUXEON color portfolio of LEDs, enables lighting designers to take the next step in delivering tunable white light in bulbs and fixtures.

LUXEON Rebel ES Lime is the proprietary LED technology in the Philips hue bulb, where it combines with LUXEON Rebel Red-Orange and Rebel Royal Blue emitters to deliver more than 16 million color options - all controlled from an iOS device. Philips hue can use color-tunable Light Recipes to help set mood and energy level in the home, office, retail, classroom and hospital environments.

“LUXEON Rebel ES Lime emitters can be combined with other Rebel color and white emitters to achieve higher CRI [color rendering index] and R9 combinations than any previous-generation emitters or arrays,” says Rahul Bammi, VP of product management.

Lime is the highest-efficacy LUXEON LED manufactured to date. It hence enables highly efficient color mixing by providing a convenient above-blackbody color point with optimal standalone efficiency of 200lm/W at 350mA and 85°C. The spectral output is closely aligned with the wavelength to which human eye cones are most sensitive (555nm). “Customers are very interested in Lime due to the outstanding efficiency and flux it brings to every lighting application,” says Bammi.

In addition to LUXEON Rebel ES, the Lime technology is offered in the LUXEON Z format, an undomed, 2.2mm2 LED that is 75% smaller than most high-power LEDs, it is reckoned. In spotlight and downlight applications, the LUXEON Z enables tighter packing density and better color mixing control, the firm says. The LUXEON Z Lime can be combined with Red and Blue LEDs to achieve a broad spectrum of saturated colors. Alternatively, tunable white light with high efficacy can be achieved over 1800-6500K along the blackbody curve.

Because Lime is closer to the blackbody curve than green LEDs, much less inefficient red is needed to make white light with Lime instead of green, especially at warmer color temperatures, notes Lumileds. For instance, color tuning of 2250-2950K can be achieved with an R9>90, CRI>90 and efficacy of 90lm/W using LUXEON Z combinations. When using a similar combination of Red, Green and Blue LEDs to create 3000K white light, the CRI is close to 20.

Tags: Lumileds

Visit: www.philipslumileds.com/LUXEONRebelColors

Visit: www.philipslumileds.com/LUXEONZ