Thursday, June 30, 2011
LED-based lighting is a proven winner in street- and area-lighting applications outdoors, and Lightfair International (LFI) yielded the expected onslaught of new and expanded product lines. And while established solid-state lighting (SSL) players in the space were omnipresent, some luminaire makers new to SSL made news, and manufacturers of larger LED chips seem to finally be positioned to succeed in outdoor applications.
Eye Lighting uses large TIR lenses
Eye Lighting demonstrated its new KiaroLED luminaire both in its own booth and in the Luminus booth. The product family utilizes the Luminus SST-90 LED that has a package size of 10x11 mm, but with an emitter diameter of around 3 mm. Most LED area lights use 1-mm or smaller emitters.
Combining reflectors and optics
Bridgelux, meanwhile, demonstrated LED-based area lights from Eagle Eye Lighting and SimplyLEDs. Bridgelux doesn’t make individual emitters that match in size those from Luminus, but the arrays offered by Bridgelux can be equally large.
Eagle Eye makes LED-based retrofit kits for existing street lights such as high-pressure-sodium (HPS) cobrahead-style lights. The company developed a module that includes LEDs, optics, driver, and a heat sink. The nearby photo shows a retrofitted light with two of the modules installed.
Eagle Eye has expertise both in LED lighting technology and in designing custom optics. The street-light design combines a custom optic and recesses the LEDs in a reflector box to form the beam pattern. The company offers its technology in Type I, II, and III beam patterns.
SimplyLEDs makes acorn-style LED lighting. It sells its products both as retrofit kits and finished products. The Anello family, for example, can create Type III and IV beam patterns. The acorn style light eliminates the need for a TIR or other optics. Instead, the Anello design utilizes nine Bridgelux arrays, each with 12 emitters that radiate light outwards. A reflector helps spread light downward.
LSG pushes integration
Lighting Science Group (LSG) also demonstrated a highly-integrated LED-based street light that could really lower the cost of entry for deploying LED lighting outdoors. LSG isn’t brand new to outdoor lighting although it isn’t as entrenched as companies such as BetaLED, GE Lighting and Cooper. In fact, LSG may be better known for indoor retrofit lamps, but its new outdoor design could change that.
LSG demonstrated its new Roadmaster design in its LFI booth that integrated the driver directly on the printed-circuit board with the LEDs. In fact, the company designed the driver without an electrolytic capacitor on the output; this is the most likely failure point in most drivers. LSG Chief Development Officer David Henderson said, “We eliminate that failure point and take the cost out.”
The 65W design is meant to replace 100W HPS lights that according to Henderson actually dissipate around 128W. LSG hasn’t set an exact price but expects to sell the luminaire in the $200 to $220 range starting later this year. At that price point, Henderson asserted that the product would pay for itself in a period equal to the first time an HPS bulb would need to be replaced – and that was based on maintenance savings alone. The initial product won’t be dimmable, but LSG plans to add that feature down the road.
Of course it’s easy to demonstrate new technology and sometimes tough to deliver it. Typically drivers with no electrolytic capacitor can create flicker due to ripple current. But Henderson said the ripple is lower in the new driver design than in previous products that use a capacitor. Warranty hasn’t been set but Henderson said it would be at least five years.
Slim design provides elegant look
Of the established leaders in the street-lighting segment, BetaLED had the most appealing new design at LFI. The company announced the LEDway SLM (single light module) and LEDway SLM IP66. The fixtures are essentially identical with the exception that the latter is IP-66 rated.
The luminaires deliver a sleek new look relative to cobrahead-styled lights. The luminaires are long and slim and use a single BetaLED light bar. The luminaires can replace 70W to 250W HPS fixtures and are meant primarily for residential streets.
Wednesday, June 29, 2011
Projections show that the cost of lighting the Upper Thames Street tunnel could fall from around GBP 50,000 each year to less than GBP 10,000. The LED lights are expected to last for 20 years, as opposed to the existing system's two-year life span, significantly reducing the need for maintenance closures. Also, the tunnel lights will cut CO2 emissions by more than 60 per cent.
Tuesday, June 28, 2011
The JetBeam RRT-3 has a maximum output of 1200 lumens, providing an effective range of 700+ yards.
The flashlights utilize Luminus’s SST-50 "big-chip" LED, a high-lumen-output, single-chip package. With an input power of 5
watts, the LED has an efficacy in excess of 100 lm/W, color temperatures ranging from 3,000K-6,500K, and L70 lumen maintenance of 60,000 hours.
50 big-chip LEDs are superior to traditional high intensity discharge lamp solutions being used in today’s reflection systems.
Luminus says that the LEDs are also ideal for retail and residential track lighting, PAR/ MR replacement lamps, high bay/low bay commercial and industrial lighting, and outdoor area lighting including roadway and acorn fixtures.
The ARC Show 2011 took place on January 12-13 and as usual showcased a number of lighting and component companies working with LEDs. Among the various announcements around the show, Arrow signed a distribution agreement with Carclo, and Architainment was announced as an authorized distributor for EcoSense Lighting (see below).
The ARC Show covers architectural, retail and corporate lighting (hence the initials), and has returned to its original home in the Business Design Centre, London, an older building which makes good use of daylighting:
AlphaLED (Projection Lighting) builds luminaires using Xicato modules (below), including the 2200-lm linear version. A new version of the standard circular module will produce 2000-lm, and AlphaLED had a prototype luminaire using this module in combination with a very large reflector to produce a powerful 10-degree beam:
Crescent Lighting showcased a range of LEDZ downlights from Endo, a Japan-based manufacturer, which are based around removable/replaceable LED modules.