Lumileds’ new LUXEON CX Plus CoBs boost intensity of chip-on-board LEDs for spotlights and downlights

Lumileds LLC of San Jose, CA, USA has introduced three lines of CoB (chip-on-board) LEDs, the LUXEON CX Plus CoB (Gen 2), LUXEON CX Plus CoB – High Density and LUXEON CX Plus CoB – High Density (Below BBL), as drop-in upgrades for both Lumileds and competing arrays. The second-generation arrays feature a 14% flux improvement on the previous generation. Delivered in a range of light-emitting surfaces (LES of 4.5mm, 6mm, 12mm and 14mm) and correlated color temperatures (CCTs of 2700-5000K), the Gen 2 arrays provide luminous efficiency of more than 140lm/W at 3000K 80CRI or 122lm/W at 3000K 90CRI.

Lumileds’ new LUXEON CX Plus CoBs.

Picture: Lumileds’ new LUXEON CX Plus CoBs.

The High Density version of the LUXEON CX Plus CoB provides what is claimed to be industry-leading punch (center-beam candle power) and is available in either on-BBL (blackbody locus) coordinates for halogen-like illumination or below-BBL for ceramic metal halide-like illumination. The LUXEON CX Plus CoB – High Density provides luminous flux of up to 1150lm at 3000K 90CRI from the smallest LES of 4.5mm. Flux is 10% higher than competing CoBs at 6mm and 9mm LES. Offered in three LES (4.5mm, 6mm and 9mm) on 13.35mm x 13.35mm substrate, the arrays cover a range of color temperatures (2700K to 5000K) with a minimum of 80CRI or 90CRI and color control within 3-step or 2-step MacAdam ellipse. For the Below-BBL versions, color temperature range is 2700-4000K at a minimum of 95CRI with color control within 3-step or 2-step MacAdam ellipse. “The below black body option is perfect for illuminating artwork, for instance, because the highest color fidelity combines with slightly more saturated colors,” says LUXEON CoB product manager LP Liew.

All LUXEON arrays utilize a metal core PCB substrate that is more resistant to cracking during luminaire assembly. The low resistance of the MCPCB also provides superior removal of heat from the LED, leading to smaller heatsinks and more compact luminaires, says Lumileds.

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