Partners
HOME    BLOGS    BLOGGERS    MESSAGES    VIDEO    AUDIO    REPORTS    RESEARCH    WEBINARS
Comments
Newest First    Oldest First    Threaded View
Page 1 / 2   >   >>
MD
MD  
1/24/2013 2:08:27 PM
User Rank Blogger
Athens street lighting
But are they LEDs?

http://www.theatlanticcities.com/arts-and-lifestyle/2013/01/if-only-all-city-lighting-looked-charming-street-athens/4473/

MD
MD  
12/13/2012 6:26:45 PM
User Rank Blogger
Re: LED lights
Ah – so they use the Ethernet for data too!? Cool.

karlL
karlL  
12/13/2012 5:43:44 PM
User Rank City Slicker
LED lights
Recently I was introduced to LED light panels that fit in a 2x2 ceiling tile configuration that use POE (Power Over Ethernet), thus eliminating the need for conduit runs, heavy guage copper wire, breakers, electrical panels, etc. The light panels have sensors that sense the amount of natural light and augment where necessary. The lighting can then be controlled by smart devices. I guess they are taking off like wildfire for new builds.

CitySolver
CitySolver  
12/12/2012 1:15:46 PM
User Rank Blogger
LEDs
I completely agree. We need to be careful how we use LEDs so that they provide value and comfort. Having bright white LEDS for street lighting is a case in point. Its too bright, increases light pollution and can be blinding to drivers and keep people awake at night 

MD
MD  
12/11/2012 10:56:46 AM
User Rank Blogger
Re: Light Fantastic
Now I'm curious about the emission spectrum of xenon! Have to check that out. Probably never catch on for indoor lighting though :-)

> Now we must get used to the light of a glowing semiconductor

Well...phosphors actually. The LEDs behind all of today's lamps are blue AFAIK! The main ones at least, which then excite one or more phosphors. Some lamps do add other colour LEDs to the mix to fill out the spectrum.

Great post, thanks.

Mary Jander
Mary Jander  
12/11/2012 10:50:34 AM
User Rank Staff
Neon, anyone?
There is an interesting article in the WSJ today about the demise of neon lighting in NYC. Once these kinds of lights too were new, but LED lighting for this type of commercial sign is rising too, no?

Mary Jander
Mary Jander  
12/11/2012 9:49:59 AM
User Rank Staff
Re: LEDs
Interesting, Simon. I assume Philips makes the LED bulbs you're liking?

Toby
Toby  
12/11/2012 8:00:09 AM
User Rank Urban Legend
Re: Light Fantastic
Simon, those would be HID (High Intensity Discharge) lights which have become very popular in cars over the last ten years. They consume half the power of Tungsten and have a much higher color temperature. They use a small arc and a Tungsten electrode so not entirely a Xenon light, but close.

Reminds me of when I was a kid I built a carbon arc light out of carbon rods from D batteries. It was great fun for 20 minutes until it blinded me. I think that was why they now say "Kids, do not try this at home.."

 

Simon Hersom
Simon Hersom  
12/11/2012 7:06:28 AM
User Rank Urban Legend
Re: Light Fantastic
An interesting news snippet from Holland was the report of a spate of thefts of the Xenon lights from Porsche cars. Apparently it takes only a minute to steal them and they're excellent for the growing of cannabis producing the best light for the least electricity.

stotheco
stotheco  
12/11/2012 5:21:27 AM
User Rank Urban Legend
Re: Article (from a mfr)
Funny that you should mention Melatonin. I was actually looking for drug-free alternatives to help me sleep (having difficulty doing so lately) so I did a quick search and came across something called Sleep Sheets. Melatonin was one of the main ingredients. My order hasn't come in yet so I'm not sure if they work, but it's an alternative if you don't like sleeping pills or medication.

Page 1 / 2   >   >>


webinars
11/13/2014
How to Deliver on the Promise of Improved Learning Outcomes Through Technology

"Adaptive learning" or "personalized learning" are hot topics in Education and for good reason with the allure of transforming teacher effectiveness and student outcomes. However, they are terms often overused, as is the notion that digital content or one-to-one devices alone will ensure success in school and out into the workplace. To truly deliver on the promise of improved outcomes requires a broader thinking of technology - including standards, enterprise systems, and an eye to the future. Join us to learn how to prepare for this transformation so that it can become a reality in your learning environment!
research
Smart City Money Makers
companies and solutions that are most prominent, and destined to be most profitable, in the smart city revolution.
How to Make Your City Smarter
Cities all over the world need to become smarter and more sustainable. But where to start? Download this guide to learn the first, proven steps toward making your city smarter.
all research
quick poll
Join the discussion
All polls
twitter feed
Future Cities Twitter Feed
follow us on facebook
Site Moderators
Future Cities is looking for engaged readers to moderate the message boards on this site. Engage in high-IQ conversations; earn kudos and perks. Interested? E-mail:
moderators@ubmfuturecities.com
directory
Designed to provide the people with access to green building products all year round
connect to us
Terms of Service
Privacy Policy
Copyright © 2014 UBM,
All rights reserved.