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  1. #16
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    Default Re: Future of non-IC lights

    Quote Originally Posted by charles View Post
    I used to think that until someone in the auto industry told me about the effort they make to keep headlamp LED's cool, with cooling fins and such. There are lots of LED's out there that are less efficient than CFL's.
    I believe you miss heard, they most likely said HID.

    Here are LED headlamp bulbs, no cooling fins;

    http://www.dhgate.com/wholesale/led+headlight+bulb.html

    You will find the same with the rest of the auto bulbs. No fins.

    Look at all the LED's in automotive/truck tail/running/signaling lights in use today.

    LED's are getting much better and do not contain mercury. I'll use an LED over a CFL, any day. There are many on the market now with higher foot candle to consumption than CFL'S.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  2. #17
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    Default Re: Future of non-IC lights

    And Home Depot has some 40w Edison base LED bulbs for around $10.
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  3. #18
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    Default Re: Future of non-IC lights

    Quote Originally Posted by tjbnwi View Post
    I believe you miss heard, they most likely said HID.

    Tom
    No, I remember because it surprised me, the same way it's surprising you guys.

  4. #19
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    Default Re: Future of non-IC lights

    Having cooling fins does not mean they are hotter/less efficient. LED's are, generally, more sensitive to heat so having a means to keep them burning cooler keeps their life, like any electronic device, maximized. The large cooling fins could well be put on to help dissipate proximate heat inputs from the engine/cooling system ...or frictional induction from insect collisions at high speed.
    “I find the curiosity of our men with respect to this animal is pretty much satisfied.”
    ~ Meriwether Lewis

  5. #20
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    Default Re: Future of non-IC lights

    Good point, but I know I've seen LED bulbs at Wal Mart that are less efficient than fluorescent. Which is not to say that all LEDs are crap - at some point this decade I expect to be buying nothing but LEDs.

  6. #21
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    Default Re: Future of non-IC lights

    Quote Originally Posted by charles View Post
    No, I remember because it surprised me, the same way it's surprising you guys.
    Who ever said it needs to do some checking. You may be miss understanding their reference to heat and how it needs to be rear dissipated. They do not "project" much heat.

    A 60 watt equivalent LED produces 3.4 BTU's per hour, a 60 watt incandescent is 85 BTU's per hour.

    Grab hold of an on halogen 55 watt headlamp bulb, does not take it long to reach 325°, do the same with a 55 watt LED headlamp. After you're treated for the halogen burns, report back.

    Tom
    Last edited by tjbnwi; 04-11-2012 at 07:22 PM.
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  7. #22
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    Default Re: Future of non-IC lights

    Quote Originally Posted by charles View Post
    Good point, but I know I've seen LED bulbs at Wal Mart that are less efficient than fluorescent. Which is not to say that all LEDs are crap - at some point this decade I expect to be buying nothing but LEDs.
    It's easy to say that. Please flush it out a bit. $:watt, $:lumen, lumen:watt. Did you know all steel hammers bend nails?
    “I find the curiosity of our men with respect to this animal is pretty much satisfied.”
    ~ Meriwether Lewis

  8. #23
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    Default Re: Future of non-IC lights

    Fluorescent efficiency tops out at about 100 lumens per watt. This LED bulb is 33 l/w:

    http://www.walmart.com/ip/Sunmia-1.5...-Bulb/14472543

    BTW, I have also seen CFL's that trip the thermal limiter on 30 yo recessed cans.

  9. #24
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    Default Re: Future of non-IC lights

    A lot of those installed by the electric co-op here are in the 50-60 lumens/watt range.

    http://springlightcfl.com/FileUpload...ht_Catalog.pdf
    Bailer Hill Construction, Inc. - Friday Harbor, WA
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  10. #25
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    Default Re: Future of non-IC lights

    Quote Originally Posted by charles View Post
    Fluorescent efficiency tops out at about 100 lumens per watt. This LED bulb is 33 l/w:

    http://www.walmart.com/ip/Sunmia-1.5...-Bulb/14472543

    BTW, I have also seen CFL's that trip the thermal limiter on 30 yo recessed cans.
    Wally World is not he place for quality products.

    The bulbs I use are in the 75-90 lumen per watt range. Life expectancy is 25,000 hours.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  11. #26
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    Default Re: Future of non-IC lights

    Tom, got a link?
    Bailer Hill Construction, Inc. - Friday Harbor, WA
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  12. #27
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    Default Re: Future of non-IC lights

    Quote Originally Posted by charles View Post
    Fluorescent efficiency tops out at about 100 lumens per watt. This LED bulb is 33 l/w:

    http://www.walmart.com/ip/Sunmia-1.5...-Bulb/14472543

    BTW, I have also seen CFL's that trip the thermal limiter on 30 yo recessed cans.
    And does Wallyworld have a comparable size and shape CFL?

    http://www.nlb.org/index.cfm?cdid=10747&pid=10213

    It's still difficult to make the broad statement w/o taking in to consideration the other factors in a bulbs design as well as the fixture and application/use and serviceability. Of course we all know a car is faster than a horse, too. ;)
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    “I find the curiosity of our men with respect to this animal is pretty much satisfied.”
    ~ Meriwether Lewis

  13. #28
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    Default Re: Future of non-IC lights

    Quote Originally Posted by tjbnwi View Post
    Wally World is not he place for quality products.

    Tom
    Agreed, but somebody asked me to give an example.

    Quote Originally Posted by MarkMc View Post
    And does Wallyworld have a comparable size and shape CFL?

    http://www.nlb.org/index.cfm?cdid=10747&pid=10213

    It's still difficult to make the broad statement w/o taking in to consideration the other factors in a bulbs design as well as the fixture and application/use and serviceability. Of course we all know a car is faster than a horse, too. ;)
    I'll let you do the research on that. I didn't make a broad statement, I said some LED bulbs are crap.

  14. #29
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    Feb 2008
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    Northwest Indiana
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    Default Re: Future of non-IC lights

    David,

    Here's the link;

    http://store.earthled.com/products/e...led-light-bulb

    Charles,

    I agree, some LED bulbs are junk.

    tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  15. #30
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    Aug 2004
    Location
    new jersey
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    508

    Default Re: Future of non-IC lights

    The reason for the heat is not the bulbs but the step down transformer inside the bulb. Led's are all 2 or 3 v I believe ( if I remember correctly, from the explanation given to me by a electrical engineer yesterday ). If you notice how heavy the 120v led bulbs are compared to the low voltage bulbs, it's because of the weight of the transformer.
    You can buy a low volt fixture with 10 led's for $18 but a 120 v with 1 to 3 bulbs are $30.

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