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Thread: OT Light bulbs inside of light bulbs.

  1. #1
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    Default OT Light bulbs inside of light bulbs.

    Changing some light bulbs that burnt out in the wife's bathroom. Not what I expected when I dropped one and it broke.



    Andy

  2. #2
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    That's standard construction for halogen bulbs because halogen capsules may shatter violently when they fail.

  3. #3
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    Yep. keeps your precious little pinkies away from the stupidly hot halogen bulb.

    They are "measurably" more efficient than standard incandescent, but nothing wonderful. And dontcha just love the "0.9 year life" ? Ten months and 27 days, just about.

    Put in an LED unless you really need the smooth spectrum of the incandescent for color matching.
    Last edited by J Tiers; 02-13-2018 at 06:54 PM.
    1601

    Keep eye on ball.
    Hashim Khan

  4. #4
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    Clumsy Bastard!
    Work hard play hard

  5. #5
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    You spilled the beans, energy hog! You should have bought LEDs.

    Oh yeah, what's with the ".9 year life"? They're not even good for a year?

  6. #6
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    There's energized parts outside the smaller quartz glass envelope so part of the outer glass job is to insulate those parts from people and the outer bulb prevents any contamination of the inner bulb which could lead to early failure. It probably looks like a bulb because using an incandescent bulb as the shield let them use existing technology to build them.

  7. #7
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    Quote Originally Posted by Arcane View Post
    There's energized parts outside the smaller quartz glass envelope so part of the outer glass job is to insulate those parts from people and the outer bulb prevents any contamination of the inner bulb which could lead to early failure. It probably looks like a bulb because using an incandescent bulb as the shield let them use existing technology to build them.
    The last piece of the puzzle is that the outer envelope is a diffuser to provide a more even light with less glare. They sometimes add phosphors to the frosting to deliver enhanced spectrum.

    Oddly, the light in question delivers 620 lumens, which is comparable to a modified spectrum like the GE Reveal models. The only problem is that it appears to provide the spectrum of a standard tungsten incandescent which should be close to 840 lumens. The arithmetic says that the 43 watt unit is only marginally more efficient than the standard 60 watt unit. 14.42 lumens per watt vs 14.00 lumens per watt for the conventional model.


    Dan
    Measure twice. Cut once. Weld. Repeat.
    ( Welding solves many problems.)

  8. #8
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    Quote Originally Posted by danlb View Post
    .....

    Oddly, the light in question delivers 620 lumens, which is comparable to a modified spectrum like the GE Reveal models. The only problem is that it appears to provide the spectrum of a standard tungsten incandescent which should be close to 840 lumens. The arithmetic says that the 43 watt unit is only marginally more efficient than the standard 60 watt unit. 14.42 lumens per watt vs 14.00 lumens per watt for the conventional model.

    Dan

    Yep... "measurably" more efficient..... Good old "Generous Electric"....

    It may be a slightly different spectrum, since I believe those can operate considerably hotter than standard bulbs, due to the halogen "fixing" hot spots.
    Last edited by J Tiers; 02-13-2018 at 08:27 PM.
    1601

    Keep eye on ball.
    Hashim Khan

  9. #9
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    Quote Originally Posted by J Tiers View Post

    Put in an LED unless you really need the smooth spectrum of the incandescent for color matching.
    You can get the same "incandescent" smooth transition in led also. Phillips - "new glo"; cree "sunset". Maybe others. I mixed incandescent with Phillips bulbs - wife couldn't tell the difference dimmed from full to nearly off (limit of dimmer)
    Last edited by lakeside53; 02-13-2018 at 09:17 PM.

  10. #10
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    " I mixed incandescent with Phillips bulbs - wife couldn't tell the difference"

    Yep, same here. It's amazing how adaptable the human vision system is. We can see "white" in a room lit by yellow candle light as easily as we can when the room is lit by an arc lamp.
    Measure twice. Cut once. Weld. Repeat.
    ( Welding solves many problems.)

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