This post was written by Keith Dawson for UBM Tech’s community Web site All LED Lighting, sponsored by Philips Lumileds. It is archived here because the All LED Lighting site has gone dark. This material is Copyright 2013-2015 by UBM Americas.

2014-03-31

Monday Roundup: Electric

This week: Smart bulbs from Samsung, a house built for an electric car, and a light engine sealed against the outdoors.

Bridgelux's sealed LED light engine
The company's second foray into the outdoor LED lighting market seems like it should be an obvious move: Package up everything from LEDs and driver to optics, and seal it against harsh conditions. The Bridgelux Outdoor Lighting Module (OLM) is rated IP-66 for resistance to intrusion by water or dust. The company says this module can cut 3-6 months off the development time for makers of SSL parking lot, industrial, or roadway lighting and shave $100,000 from the R&D budget.


Bridgelux Outdoor Lighting Module.
(Source: Bridgelux)

Each module has two Vero 10 COB LEDs. The modules come in six variants from 2,000 to 4,000 lumen. Designers can use one, two, or three OLMs in a fixture to enable SSL products replacing HID or HPS lighting in a range of 70-250 W. The OLMs consume 14-40 W and achieve luminous efficacy of 96-124 lm/W.

Bridgelux's solution for thermal management is simple and elegant. The two LEDs protrude from the back of the sealed module. When screwed down to a heat sink, they offer a trivial thermal path.

The modules will be available in June.

LED Engin's tunable white module
The company has announced LuxiTune 2.0, a 1,100-lumen module that offers tunable CCT with independent, constant-CCT dimming. In a second mode, called "halogen dim," the light grows warmer as it dims. One dimming mode or the other can be selected by DMX control. (DALI is promised for the second quarter.)

This community has discussed halogen-style dimming, or dimming to warm, previously. Last summer, we ran a quick poll that asked whether people preferred that mode of dimming or one in which the CCT holds steady over the range. Constant-CCT dimming won out by a two-to-one margin. Nevertheless, there is a market for dim-to-warm technology, particularly in the hospitality and restaurant sectors.

LED Engin's offering takes particular care to maintain color quality under all conditions of dimming. The CRI is more than 90 at full illumination and averages 85 throughout dimming in either mode. The dimming curve follows the blackbody locus but sits below it for increased color vibrancy. Color quality and consistency stay within 3 SDCM under all conditions, LED Engin says.

In CCT-tune mode, the module can be set anywhere in the range from 2,100 K to 4,300 K. In halogen-dim mode, the range runs from 3,000 K down to 1,800 K. Modules are available in beam angles of 24°, 34°, and 45°.


Samsung's Bluetooth Smart Bulb.
(Source: Samsung)

Smart bulbs from Samsung
At Light+Building in Frankfurt, Samsung will show Bluetooth-controlled smart bulbs. No pricing has been announced. These lights have a bit more smarts than those being touted by TCP or Belkin. In addition to being dimmable (down to 10%, Samsung says), they allow the CCT to be tuned between 2,700 K and 6,500 K.

In addition to the classic modified sno-cone look, Samsung announced PAR and swivel-head PAR configurations.

The press release says that a ZigBee Smart Bulb is available for commercial installations. Presumably, this uses the Marvell ZigBee SoC we discussed a year ago.

A house built for an electric car
Honda, of all organizations, has built a model energy-efficient house in Davis, Calif. It has LED lighting throughout, as you would expect, along with radiant heating and cooling, a geothermal recovery system, and a large solar installation on the roof. The house is designed to be energy-positive, contributing power to the grid.

A main focus of the house is the garage. It is equipped to charge a plug-in electric vehicle, such as the Honda Fit EV. It has both a 240V Level 2 charging station and a 10-kWh lithium-ion battery (40% of the capacity of the Fit's battery), which is charged from the solar panels. The Fit is equipped to take a DC charge via this route.

The 2,000-square-foot (186-square-meter) house is built in a development near the campus of the University of California, Davis. It will be opened to visitors for a time and then used for three years by UC-Davis visiting faculty -- three tenants for a year each. The lucky tenants will also have the use of the plug-in Honda Fit.

— Keith Dawson Circle me on Google+ Follow me on Twitter Visit my LinkedIn page, Editor-in-Chief, All LED Lighting

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