Berkeley CSUA MOTD:Entry 41064
Berkeley CSUA MOTD
 
WIKI | FAQ | Tech FAQ
http://csua.com/feed/
2017/12/15 [General] UID:1000 Activity:popular
12/15   

2005/12/18-19 [Science/GlobalWarming, Science/Electric] UID:41064 Activity:kinda low
12/17   Has anyone used a led lightbulb like this? How bright is it compared
        to a regular light blub?
        http://www.amazon.com/gp/product/B000B8YY3A
        \_ That's LED, not led. Anyways, I really don't understand this
           fascination with energy saving bulbs. In a typical home,
           lighting uses less than 15% of the total electricity. Most
           goes to creating/removing heat (AC, frig). What is the point
           of spending money on expensive light bulbs that'll only cut
           energy cost by 5%?
           \_ A 100W equivalent compact fluourescent saves you something like
              $30 over the life of the bulb, IIRC.  Why would you not want to
              do that?  They also produce much much less heat, which will save
              on cooling costs.  Percentages are great, but money is money.
              --dbushong
           \_ Replacing bulbs in ceilings is a chore?
              \_ I don't have cooling problems.  I want my place warmer.  Would
                 you think I'd be better off over all using these bulbs and
                 then turning the heat up more or leaving the heat lower and
                 keeping my regular bulbs?
                 \_ Your logic applies in winter, but not in summer.
                 \_ Do you heat with electric or gas?
           \_ Because replacing bulbs in ceilings is a chore?
           \_ Cutting back 15% would mean we wouldn't have to drill in ANWR
        \_ According to cyberguys' web page, it outputs 32 lumens and is
           equivalent only to a 15W incandescent: http://csua.org/u/ecv
           \_ Umm, the one at cyberguys's is 18 LED version and the one at
              Amazon is 36 LED version from a differernt company, even.
              \_ Oops.  Wrong one. http://csua.org/u/ecw
                 55 lumens and 25W (which isn't even double the 18 LED version,
                 go figure).  How do you know it's a different company?
                 The Amazon page doesn't list the manufacturer; SmartHome is
                 a retailer, and it looks the same to me.
                 \_ 25W?  I can't even find the floor with 25W.  --old n blind
                    \_ Make sure you are comparing apples to apples ... A
                       14W fluorescent bulb puts out the same light as a 40W
                       incandescent ... I imagine LED lights are even more
                       efficient.
2017/12/15 [General] UID:1000 Activity:popular
12/15   

You may also be interested in these entries...
2014/1/24-2/5 [Science/GlobalWarming] UID:54765 Activity:nil
1/24    "Jimmy Carter's 1977 Unpleasant Energy Talk, No Longer Unpleasant"
        link:www.csua.org/u/128q (http://www.linkedin.com
	...
2012/12/7-18 [Science/GlobalWarming] UID:54550 Activity:nil
12/7    Even oil exporters like UAE and Saudi Arabia are embracing solar
        energy: http://www.csua.org/u/ylq
        We are so behind.
	...
2012/6/22-7/20 [Politics/Domestic/California, Science/GlobalWarming] UID:54420 Activity:nil
6/22    "Study: The U.S. could be powered by 80% green energy in 2050"
        http://www.csua.org/u/wtz  (news.yahoo.com)
        \_ How many Republicans does it take to make green energy?
           -150,000,000! Ding ding ding!
           \_ Because having control of the White House and both houses of
              Congress wasn't enough (ie, the do nothing and blame the
	...
2012/6/26-7/20 [Science/GlobalWarming] UID:54422 Activity:nil
6/26    WW2 brought us antibiotics, syringe, production capacity,
        excessive petroleum, radar, television, atomic energy,
        rocketry (HEIL VON BRAUN), synthetic rubber, microwave,
        computers (GAY TURING), jets.
        What did the Iraq war bring us?
        \_ HMMWV -> Hummer H1 the gas guzzler.
	...
2011/2/1-19 [Politics/Foreign/Asia/China, Science/GlobalWarming] UID:54022 Activity:nil
2/1     10 Industries in Which the U.S. Is No Longer No.1"
        http://www.csua.org/u/sgw (finance.yahoo.com)
        China betas us in 7 out of 10 categories, including high-tech exports
        category.
        \_ So, only 3 more to go until we declare war?
        \_ Some of those positions are simply determined by
	...
2010/12/2-2011/1/13 [Science/Space] UID:53986 Activity:nil
12/2    'Starry, starry, starry night: Star count may triple'
        http://news.yahoo.com/s/ap/20101202/ap_on_sc/us_sci_starry_night
        'So the number of stars in the universe "is equal to all the cells in
        the humans on Earth, a kind of funny coincidence," Conroy said'
        Another coincidence is that 1 mole = 6.02 * 10^23.  So the number of
        stars = # of molecules in 1 gram of H2 gas.
	...
2010/12/1-2011/1/13 [Science/GlobalWarming] UID:53987 Activity:nil
12/1    "US: China rise a 'Sputnik moment' for clean energy"
        http://news.yahoo.com/s/afp/20101130/sc_afp/unclimatewarminguschina
	...
2009/11/11-30 [Science/Physics, Science/GlobalWarming] UID:53518 Activity:low
11/11   Watch the History Channel today! It's got Oppenheimer and the atomic
        bomb history. Did you know at one time 10% of the entire electricity
        in the U.S. was used to refine U235 and weapon grade plutonium?
        Holy jesus! I wonder how much energy is used to get plutonium fuel
        that generates today's nuclear powered electric plant
        \_ it talks about the 2 different methods for getting U235. So
	...
2009/5/19-25 [Science/Electric, Science/GlobalWarming] UID:53011 Activity:nil
5/18    Does the new federal vehicle fuel-efficiency requirement specify how
        efficiencies of plug-in hybrids will be calculated?  Some plug-in
        hybrids claims to have ridiculously high efficiency like 100mpg because
        they're not counting the energy input from the electric grid.  That's
        not a good indiction of their actual energy efficiency.
	...
2009/4/9-20 [Science/Electric, Politics/Domestic/President/Bush] UID:52834 Activity:nil
4/9     "Ex-official: Spies have hacked electric grid"
        http://www.csua.org/u/nyg (http://www.sfgate.com
	...
2009/2/15-18 [Science/Electric, Science/GlobalWarming, Computer/HW/Drives] UID:52576 Activity:nil
2/15    How many watts does a typical desktop (not counting monitor)
        use when it is completely idling (top shows at most 1-2% CPU),
        assuming normal SATA HD, video card, 2-4G RAM?
        \_ Google did a published study where they determined that the
           largest consumer of energy in a computer is the power supply
           itself. Figure that if you have a 400W power supply you are
	...
2008/7/16-23 [Science/GlobalWarming] UID:50593 Activity:nil
7/16    China burned 1.9 billion metric tons of coal in 2004. By 2020, predicts
        the China Coal Industry Development Research Center, it will burn 2.9
        billion tons a year. That increment alone will send as much carbon
        dioxide into the atmosphere as 3 billion Ford Expeditions, each driven
        15,000 miles a year. This puts into sobering perspective the meager
        efforts of the U.S. to stave off global warming by improving gas
	...
Cache (903 bytes)
www.amazon.com/gp/product/B000B8YY3A
Camera & Photo Features: * Output: 110 degree beam * Volts: 120 * Watts: 22 * LEDs: 36 * Color: Cool white Product Details * Product Dimensions: 40 x 30 x 30 inches ; com: September 14, 2005 * This page was created by a seller. Product Description Product Description: Imagine a light bulb that lasts 10 years and consumes only 2-3 watts of p ower... These LED replacement bulbs are smaller than standard bulbs and screw into standard light sockets. Perfect for hard-to-reach installations where bulbs are difficult to cha nge. If left on for 12 hours a day for a year, one of these bulbs would use about $1 worth of electricity. Suggestion Box Your comments can help make our site better for everyone. If you've found something incorrect, broken, or frustrating on this page, let us know s o that we can improve it. Please note that we are unable to respond dire ctly to suggestions made via this form.
Cache (360 bytes)
csua.org/u/ecv -> www.cyberguys.com/templates/searchdetail.asp?T1=250+0176&dept=lch10&search=1ac10&child=1ac10
Imagine a light bulb that lasts 10 years and consumes only 1-2 watts of p ower... These LED replacement bulbs are smaller than standard bulbs and screw into standard light sockets. Perfect for hard-to-reach installations where bulbs are difficult to cha nge. If left on for 12 hours a day for a year, one of these bulbs would use about $1 worth of electricity.
Cache (534 bytes)
csua.org/u/ecw -> www.cyberguys.com/templates/searchdetail.asp?T1=250+0181&dept=lch10&search=1ac10&child=1ac10
Turn any household lamp into a low-cost marvel of efficiency by installin g this 36-LED ultra-bright bulb. They are especially great for reading, accent, and porch lighting. Imagine a light bulb that lasts 10 years and consumes only 2-3 watts of p ower. These LED replacement bulbs a re smaller than standard bulbs and screw into standard light sockets. Pe rfect for hard-to-reach installations where bulbs are difficult to chang e If left on for 12 hours a day for a year, one of these bulbs would us e about $1 worth of electricity.