ddrueding
Fixture
Low energy efficiency vs. Mercury....where are my cost equivalent LED fixtures? If energy efficiency is better than incandescent, that is enough for me to switch.
Low energy efficiency vs. Mercury....where are my cost equivalent LED fixtures? If energy efficiency is better than incandescent, that is enough for me to switch.
To put the whole problem with the CFB mercury in relation, 100 Million light bulbs at 5 mg each contain a total of 500 kg of mercury.
The EPA estimate for mercury emissions from coal fired power plants is 50,000 kg a year.
The pushers of CFL bulbs somehow assume that all electricity comes from the dirtiest of coal powered plants when that is not even close to being correct.What the Slashdot article failed to mention is that the EPA is making the power plants clean the mercury out. And new legislation will reduce it even further.
But, the number of CFLs ending up in landfils will slowly raise over the next few years.
It is a no win situation. We will be breathing in less mecury, but drinking more mercury in our water.
Something else interesting. (where I work) Regular used flouresent tubes must be packaged up and sent to a company to be disposed of properly. CFLs don't. They go into the regular trash.
At a place where I used to work CFLs were thrown away, and regular fluorescents were intentionally broken so they would fit in the trash. I remember watching the maintenance guy breaking more than a dozen and sweeping all the fragments into the trash.
Yup. I've been scanning CPF and came to a similar conclusion (close, but not yet). I like a LOT of light when I work, cook, clean, and read. It seems that the best bets are still fluorescent tubes; but those aren't dimmable either.
I'm ready for LEDs now. Do I really have to wait another year to replace my CFLs?
Local subway riders are seeing new high-tech advertising as they travel through dark tunnels.
Up until now, Metro's advertising revenue was coming from ads placed on the sides of the buses or inside the train stations, bringing in about $20 million a year.
Click in the Eyewitness News Story Window above to watch Melissa MacBride's report from the scene.
The newest moneymaker has been installed north from Hollywood. The live action advertising shows on the way to Universal City.
Story continues below
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"It threw me back a little bit, but once I saw the whole thing, I was like, 'that's a neat idea,'" said Metro rider Darryl Sheard.
The pilot project is two years in the making, and it's making its U.S. debut in Los Angeles. The LED system composed of 360 digital strips along 450 yards of the subway tunnel. The panels light up as the train goes by, showing a 15 second ad viewed at 70 miles per hour.
"It's operated and controlled from a remote location, so that ads can change at any time. You could be seeing one ad in the morning, a different ad in the evening," said Metro spokesman Warren Morse.
The new high-tech display will fetch $240,000 a year for Metro, and it doesn't cost the transit agency a dime.
The money goes back into Metro's electricity and staffing costs and other transit services.
An ad for Target will start airing Tuesday afternoon.
The southbound side from Universal to Hollywood and Highland will be eventually getting these screens as well, and if the demand grows, Metro could be adding more of these advertising displays on its other lines.
Not really. You have to put them on every train for starters. That makes it way more expensive. Electronic equipement and trains don't mix due to the huge amount of RFI generated by the motors. And many tunnels might not make decent projection screens. This is especially true in NYC where you have dozens of different types of tunnels.Why not just mount projectors on the trains that light up the wall? I would think that would be cheaper.
The reveal, scheduled to kick-off the Memorial Day weekend, will dazzle onlookers with an all-new lighting package illuminating the Southern California coastline with 160,000 energy-efficient LED lights replacing the 5,392 red, white and blue traditional light bulbs that now flicker on the wheel's spokes and hub. The enhanced LED lighting will provide higher energy savings while complementing the solar-power application. Featuerd as a backdrop in countless feature films, nightly newscasts and more, the new illumination package will also display dynamic, eye-popping computer-generated lighting entertainment in the evenings.
The 90-foot-tall, solar-power-assisted Pacific Wheel will be revealed starting at 8:30 p.m. Wed., May 28, 2008, with a fireworks show followed by free rides for the public from 9 p.m. to midnight.
Depending on the season, the 160,000 LED lights might illuminate a Valentine’s heart, Fourth of July American flag or a Christmas wreath.
The old wheel sold on eBay for $132,400.
UPDATE: The original post had the opening of the Pacific Wheel taking place Thu., May 22. However, due to construction delays, Pacific Park has postponed the unveiling until Wed., May 28.
As shown in the graph, the LEDs can be driven at 1.4 A, and produce up to 500 lm.
Don't know about Osram but there are generally about six months to 1 year in between a lab announcement and actual product with Cree.Osram reports 155 lm and 136 lm/W from R&D LED
http://www.ledsmagazine.com/news/5/7/22
Hmm, wonder when these might become an actual product...1 year, 2years?
DealExtreme
Please note that it's too narrow to accept 18650 protected cells - you'd have to settle for 17670 or rechargeable CR123A if you don't want to use primary cells.
Dozens of Silver Lake residents gathered yesterday at City Hall to protest against a pulsating digital billboard that recently popped up along Silver Lake Boulevard throwing lights into neighborhood homes.
“Silver Lake is one of the most desirable neighborhoods in Los Angeles,” said Suzanne Feller-Otto to the City’s Planning and Land Use Management (PLUM) Committee. “In one step you have taken it down to the bottom.”
Music publisher Robert Balter, who lives just a half-block away from the electronic sign, which is located at 1701 N. Silver Lake Blvd. in front of Spaceland and a few eclectic shops, told the committee, which meets on the third floor of City Hall in the John Ferraro Council Chamber, that the only entity benefiting from the billboard was its owner, Clear Channel Outdoor. “The city gets absolutely nothing but a hundred dollar fee – if that,” he argued. “The city doesn’t get anything and the neighborhood gets an accelerated deterioration of their quality of life.”
That depends on what you mean by "better". Brighter, longer throw, or what?So what is up lately in the LED flashlights? I have been using the Fenix TK-11 for awhile. Is there anything better of the type?