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20 responses

  1. Bill486
    June 23, 2011

    Great effort for efficiency!!

    Reply

  2. lkohan
    March 21, 2011

    I find your article informative, but I would like to add a couple of comments about your information on natural day-lighting. Heliostats are a mainly a commercial “concentrator” technology used for heating as well as lighting and are usually mounted on flat roofs.

    A major, and highly affordable natural day-lighting technology which you did not mention are solar tubes (aka tubular skylights, solar pipes, sun pipes, etc.). A solar tube uses a clear dome that passes sunlight through highly a reflective tube that then diffuses the natural light into a space. They resemble round ceiling-mounted light fixtures (with no switch), and are great used in hallways, closets, bathrooms, kitchens, etc. They are inexpensive (on the order of a few hundred dollars or less), and do not alter your roof structurally, since they fit between the attic rafters. While this technology has been around for about 20 years, it only improves, and comes down in price. Solar tubes are a great way to bring in natural light to areas where windows are not feasible. It’s hard to walk by these and ignore the impulse to turn off a light switch.

    Reply

  3. greenlivingguy
    February 2, 2011

    Hello all. My first comment on this site. Yeah!! Anyway, for further reference, please consider checking out my book Green Lighting with McGraw-Hill. As it says on the site and book:
    Flip the switch to energy-efficient lighting

    This do-it-yourself guide makes it easy to upgrade residential and commercial lighting to reduce costs and environmental impact while maintaining or even improving the quality of the lighting. Filled with step-by-step instructions, Green Lighting shows you how to save money and energy with light-emitting diodes (LEDs), compact fluorescent lighting (CFL), solar lights, windows, skylights, fixtures, controls, and other bright ideas. Methods for calculating return on investment, plus recommended sources for energy-efficient products, are included in this practical resource. Thanks!!!

    Reply

  4. joppe
    January 24, 2011

    “a 23 watt CFL can produce about 100 watts of light”

    no, it can’t. i presume you meant to say “about the same amount of light as a 100 watt incandecent”

    Reply

  5. solidapollo
    January 23, 2011

    “Why do the LED bulbs I have in my light fixtures at home glow at night even with the light switch turned off? Am I wasting electricity or is there something wrong someplace?”

    The reason they still shine is the following:

    1. You have a dimmer in the wall.
    2. You have a timed switch, like timed switches in bathrooms.
    3. If the answer is NO to number 1 and 2 it is because the phosphur in the LEDs is still excited and it take a couple of minutes to loose the “excitment”.

    solidapollo.com

    Reply

  6. solidapollo
    January 23, 2011

    Hi Pierre F:

    That is because you have not seen good quality LED lightbulbs. Light is exactly like incandescent, you can even notice the difference.

    Solidapollo.com

    Reply

  7. Pierre F. Lherisson
    January 22, 2011

    I still prefers the 100 watts incandescent light bulbs for reading because they are much brighter

    Reply

  8. AGAPETUS
    January 22, 2011

    Why do the LED bulbs I have in my light fixtures at home glow at night even with the light switch turned off? Am I wasting electricity or is there something wrong someplace?

    Reply

  9. DORGD
    January 20, 2011

    guess what you have to do if you break one in your home??? 3 pages of instructions because they contain MERCURY!!! http://epa.gov/cfl/cflcleanup.pdf But don’t eat fish with mercury in them but go ahead and put these all over hour home!

    Reply

  10. itz4me515
    January 20, 2011

    Why didn’t you cover cold cathode lighting?

    Reply

  11. solidapollo
    January 20, 2011

    LED Lighting has more uses than you can imagine. For example, LED are being installed in carpets.

    Look here to see what I mean: http://www.solidapollo.com/blog/?p=190

    SolidApollo

    Reply

  12. Charly
    January 19, 2011

    Hello! I saw this LED lamp first in a documentary called “Buy, discard, buy”, it shows how lamps and many other products are designed to fail in a determined time of use, wich is called “planned obsolence”. I let all of you here the link:

    http://www.youtube.com/watch?v=QosF0b0i2f0

    (it’s in spanish, didn’t found it in english)

    Reply

  13. kdalnation
    January 19, 2011

    Great article! I had no idea how much I didn’t know about green lighting. Time to get my home up to par.

    Reply

  14. Andrew Michler
    January 19, 2011

    Living off grid lighting take up 40% of my energy budget- LEDs are going to make a huge difference.

    Reply

  15. David Brodeur
    January 19, 2011

    A great guide for the lighting newbies out there, I can’t wait for those OLEDs to become more commonplace!

    Reply

  16. Rebecca Paul
    Rebecca Paul
    January 19, 2011

    This article is great! I’ve definitely found myself lost from time to time when it comes to eco friendly lighting. This post is informative and easy to understand. Excellent work.

    Reply

  17. Kestrel Jenkins
    Kestrel Jenkins
    January 19, 2011

    brilliant post. the explanations of lighting terms help clarify some of the specifics i was a bit fuzzy about. history aspects are super interesting as well.

    Reply

  18. Jessica Dailey
    January 19, 2011

    The OLEDs look really cool — seems like they would be perfect for street lights!

    Reply

  19. Diane Pham
    Diane Pham
    January 19, 2011

    thanks for this post dan! this is great guide for people who are looking to change out their bulbs and don’t know what their choices are!

    Reply

  20. Jasmin Malik Chua
    January 19, 2011

    This is infinitely helpful—thank you!

    Reply

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