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I think I am impressed. An LED house.

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  • I think I am impressed. An LED house.

    I opened up a bunch of tabs the other day and got distracted and lost it -and I have now found it again!
    http://dmcleish.com/MauiHome/
    Turned up in a random google search a few days back.
    Seems a little over the top, but impressive.

    The one thing that bothers me about it- is that the guy is married to a whole lot of expensive semiconductors,
    Piles and Piles of High-end LED's - that will be rapidly outdated in months-to-years.

    They will still work a long time from now, surely, as it looks like he has done the math but - for solar I think less might be more.

    Good for ideas, but solar-wise it should probably be scaled back so it is feasible to replace 1 or 2 LED chips per room every few years to stay on the most efficient side of technology. For a small scale system, this looks like an advantage (cabin/boat/rv) But for larger larger systems we might be a couple of years yet before you can replace your big-output lighting. I bet another 10 years or so for a standard Edison bulb.

    Very impressive to draw ideas from, but in a different configuration than what would interest most here.

  • #2
    How about going to bed at dark and then get up when there is daylight.......assuming the house has windows.

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    • #3
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      Last edited by Mike90250; 07-02-2012, 09:49 AM. Reason: broke link

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      • #4
        I am impressed also with the useful help of LED Lighting because it can reduced power consumption. I found out also that LED lights can last from 50,000 to 100,000 hours. Incandescent light bulbs typically last around 1,000 hours and fluorescent are good for roughly 10,000 hours.

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        • #5
          Originally posted by audrey.hudges View Post
          I am impressed also with the useful help of LED Lighting because it can reduced power consumption. I found out also that LED lights can last from 50,000 to 100,000 hours. Incandescent light bulbs typically last around 1,000 hours and fluorescent are good for roughly 10,000 hours.
          LED lighting often has a very low power factor and high energy consumption due to consumption by the driver.

          T5 fluorescents are generally more saving on power.
          [SIGPIC][/SIGPIC]

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          • #6
            Power factor is not an issue if you use 12v LED lighting. I have replaced all our 20 w halogen MR16s with 3 w LED versions about same light output but total draw each lamp is 6 w.

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            • #7
              Originally posted by Sunny Solar View Post
              Power factor is not an issue if you use 12v LED lighting. I have replaced all our 20 w halogen MR16s with 3 w LED versions about same light output but total draw each lamp is 6 w.
              The efficiency depends upon the transformer - The LEDs on the market today are a mixed bag - some more or less OK and others not good. On our drive I have 12 fixtures with 6 LEDs each - the current draw is good at about 75 watts for the system but already two drivers have failed.

              6 watts is very high?
              [SIGPIC][/SIGPIC]

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              • #8
                They are CREE and yes they do draw 6w. They get quite warm so it easy to believe the 3w "loss".but that is still a huge reduction from the 20w halogen bulbs they replace.. No other losses as we run the LEDs from the 12v solar recharged batteries. Have all been in constant use now almost 4 yrs ,no failures.. The house perimeter ones are on 10 hrs a day.

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                • #9
                  Originally posted by Sunny Solar View Post
                  They are CREE and yes they do draw 6w. They get quite warm so it easy to believe the 3w "loss".but that is still a huge reduction from the 20w halogen bulbs they replace.. No other losses as we run the LEDs from the 12v solar recharged batteries. Have all been in constant use now almost 4 yrs ,no failures.. The house perimeter ones are on 10 hrs a day.
                  If the CREE LEDs draw 6w (not unreasonable for multiple dies on a single chip or multiple chips), then the wasted power is more like 4 watts or even more. The heat sink should get pretty hot.
                  SunnyBoy 3000 US, 18 BP Solar 175B panels.

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                  • #10
                    Inetdog they are 3 watt rated. And as I said give out about same light as 20w Halogen.
                    They dont really get "hot" but get to about 55deg C or about 130deg F.

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                    • #11
                      Originally posted by Sunny Solar View Post
                      Inetdog they are 3 watt rated. And as I said give out about same light as 20w Halogen.
                      They dont really get "hot" but get to about 55deg C or about 130deg F.
                      So what is happening is that 3 watts are being dissipated by the LED. Some in the form of light, but most in the form of heat, while the remaining three watts are being dissipated just as heat by the circuitry which controls and limits the current through them. I have a 3 watt CREE LED in a flashlight, and on full power some of the heat is being dissipated in the batteries (Li non-rechargeable) also!
                      SunnyBoy 3000 US, 18 BP Solar 175B panels.

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                      • #12
                        I looked at LEDs for my house. After seeing that house I am glad I didn't go that route.

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