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
12/13/2012 6:26:45 PM
User Rank Blogger
Re: LED lights
Ah – so they use the Ethernet for data too!? Cool.
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.
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
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.
Re: LEDs
Interesting, Simon. I assume Philips makes the LED bulbs you're liking?
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.."
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
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.
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