Recently in Streetlights Category

Solar Vision Pole lamp post highlights LED lighting

By Alun Williams - Electronics Weekly.com on November 26, 2009 11:40 AM | No Comments | No TrackBacks
Margery Conner, Technical Editor of EDN, has wrriten an interesting article about off-grid street lighting, which involves white LEDs.

Despite the efficacy of HB LEDs, she notes, their cost is such that they can struggle to compete head-on with older forms of lighting. However, certain apps can justify the paying of a premium in return for high efficiency...

She writes:
Continue reading Solar Vision Pole lamp post highlights LED lighting.

LED street lamp driver circuits - how to design them

By Alun Williams - Electronics Weekly.com on September 30, 2009 11:48 AM | No Comments | No TrackBacks
Christopher Richardson, systems applications engineer for lighting at National Semiconductor, investigates LED street lamp driver circuits.

In an in-depth article recently added to the site, he considers driver topologies, DC bus voltages, and design challenges with buck regulators.

He begins:
Continue reading LED street lamp driver circuits - how to design them.

LED Dragonfly street lighting, with camera

By Alun Williams - Electronics Weekly.com on September 9, 2009 2:29 PM | 2 Comments | No TrackBacks
led dragonfly.jpg
We've been writing about the rollout of LED streetlights, well, why not go the whole hog and have LED Dragonflies atop the lamps?

Note, however, they also conceal cameras for eyeing the street below. Street art and security benefits...

See these efforts, apparently from Seoul, South Korea (thanks to www.newlaunches.com for this one).
Continue reading LED Dragonfly street lighting, with camera.

Rollout of LED street lighting goes strong in Portugal

By Alun Williams - Electronics Weekly.com on September 7, 2009 12:17 PM | No Comments | No TrackBacks
Check out our Distribution World blog for an update on the progress of LED streetlighting in Europe - LED Lighting Watch: Portugal turns on 10 cities

The rollout of LED street lighting has been going strong in Portuguese towns all summer, writes Richard Wilson.

Continue reading Rollout of LED street lighting goes strong in Portugal.

Power Integrations LED streetlight design is 92% power efficient

By Alun Williams - Electronics Weekly.com on June 24, 2009 11:47 AM | No Comments | No TrackBacks
Power Integrations.jpgPower Integrations has released an 92% efficient LED streetlight power supply reference design, reports our Technology Editor Steve Bush. For streetlights up to 150W, the supply has a fixed output voltage of 48V at up to 3.125A.

Central to the circuit is the firm's HiperPLC chip, aimed at converters between 80 and 600W, which combines power factor correction (PFC) and a resonant (LLC, inductor inductor capacitor) down converter on the same die.
Continue reading Power Integrations LED streetlight design is 92% power efficient.

For crying out loud ...

By Gordon Routledge on January 15, 2009 3:16 PM | No Comments | No TrackBacks

That's me having a Jeremy Clarkson moment on seeing this headline.

"Brooklyn Park residents complain LED bulbs are too dim."

The article in an American paper reports that some people in Brooklyn Park, NY say the energy-saving streetlights now being tested aren't such a bright idea. This is on the level of the New York City residents complaining that they could not see our LED Beacon light from a car on the top of the George Washington Bridge, because the flashing red light was a staple of NYC.  Our light was designed to purposely reduce ground scatter, or the "non useful" light shining downwards.  They actually made us re-design them a special Beacon with scatter built-in so the citizens would not complain.

At least I agree with one of the reader comments on this article:

"Remember when we had plain old incandescent lightbulbs for streetlights? They sure didn't put out any light, but they were a blast to break with snowballs."

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Author Profiles

Gordon Routledge
Gordon Routledge is one of the original pioneers in LED illumination having worked with LEDs in illumination applications since 1996. Currently VP of Illumination at Dialight, Gordon founded Lumidrives in 2001, having previously been managing director at ACDC Lighting Systems. Gordon has a degree in Electrical & Electronic Engineering from university of Manchester Institute of Science and Technology.

Alistair Winning
Since graduating in Electronic Systems from the University of Paisley in 1997, Alistair has worked in the electronics design publishing industry. He has held various jobs in both journalism and PR/marketing including editor of Electronic Engineering Design and Embedded Systems Engineering and Account Manager at JDK Marcom. He is now working as Editor for Premier Farnell and recently launched its in-house technical magazine, Technology First.

Ian Bryant
ian bryant.jpgIan Bryant is Business Development Manager LED Division at Carclo Technical Plastics. He has worked on and off at Carclo (Formerly Combined Optical Industrial) since leaving school. He has worked through the company from Toolmaking to starting the company on the road of LED optics business some 6-7 years ago, starting with a standard range and more in line with the business of custom optics. In between all this he has worked in engineering and as a works Director for a hydraulics company but kept getting pulled back to the optics industrial. We are able to offer the full solution from idea to parts so have a very good understanding on what is needed. You will see some posts from our design team also under my name.

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This page is an archive of recent entries in the Streetlights category.

Standards is the previous category.

traffic signals is the next category.

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