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Author Topic: LED bulbs  (Read 1273 times)

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okie smokie

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Re: LED bulbs
« Reply #15 on: December 23, 2018, 05:21:16 PM »

  For the most part, Led bulbs just don't drop dead as incandescent bulbs do.  As time goes on the light output (lumens) decrease. It starts somewhere ~ way in the life cycle. Color temperature changes as

well..That translates to high hour LED bulbs generating a lower and different light... Heat, such as over the stove or an enclosed luminary does shorten LED bulb life. Heat to life ratio is exponential...

On a contrary note, they stop working ~ -40º...   LED bulbs have come a long way in recent years w/ costs way down and quality vastly improved.

So not a good choice in the Klondike this time of year.
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JoeGrilling

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Re: LED bulbs
« Reply #16 on: December 24, 2018, 04:57:51 PM »

I bought a couple of Christmas miracle LED bulbs ten years ago.  We have a staircase leading to the second floor that has two vented light fixtures in the wall.  These units were designed for 25 watt bulbs and setup on a set of two way switches.  I must have replaced them yearly during the first ten years we lived in the house.  This was getting to be a real pain since two screws need to be removed on each vent cover to replace a bulb.   I'm not sure what brand LED bulbs we bought but they have been going strong for years with one slight issue.  Both bulbs glow dimly with the power off.   
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okie smokie

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Re: LED bulbs
« Reply #17 on: December 24, 2018, 10:55:02 PM »

I bought a couple of Christmas miracle LED bulbs ten years ago.  We have a staircase leading to the second floor that has two vented light fixtures in the wall.  These units were designed for 25 watt bulbs and setup on a set of two way switches.  I must have replaced them yearly during the first ten years we lived in the house.  This was getting to be a real pain since two screws need to be removed on each vent cover to replace a bulb.   I'm not sure what brand LED bulbs we bought but they have been going strong for years with one slight issue.  Both bulbs glow dimly with the power off.
Do they glow dimly for just a while or permanently when off? When current is off, they might glow for a few seconds, but then should be off!  If they glow permanently, you are getting some leakage from somewhere.  IMO that is.  ?
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GREG-B

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Re: LED bulbs
« Reply #18 on: December 25, 2018, 12:56:30 AM »

I have a couple of hi-end flashlights from LED Lenser.   Had them for quite some time now and one of them started giving off a dim glow when switched off.   Took it into LED Lenser in Portland, was hoping to have it repaired, the sales lady put new batteries in it and tried it and no go.   Took the batteries out and tossed it in the trash and gave me a new one.   Not sure what the lumens are but I can shine up the trees on the back of our property looking for lurking coyotes waiting to feast on our chickens if given a chance. >:(   Have very few light bulbs anywhere that aren't LED.
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JoeGrilling

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Re: LED bulbs
« Reply #19 on: December 26, 2018, 03:01:49 AM »

Do they glow dimly for just a while or permanently when off? When current is off, they might glow for a few seconds, but then should be off!  If they glow permanently, you are getting some leakage from somewhere.  IMO that is.  ?

Yeah we agree on the leakage.  They glow dimly all the time when off.  We figured it must be syncing current to neutral and the hot leads must be getting a small amount of current from someplace...possibly induction.  We wouldn't have noticed with incandescent bulbs.
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okie smokie

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Re: LED bulbs
« Reply #20 on: December 26, 2018, 06:56:55 PM »

Do they glow dimly for just a while or permanently when off? When current is off, they might glow for a few seconds, but then should be off!  If they glow permanently, you are getting some leakage from somewhere.  IMO that is.  ?

Yeah we agree on the leakage.  They glow dimly all the time when off.  We figured it must be syncing current to neutral and the hot leads must be getting a small amount of current from someplace...possibly induction.  We wouldn't have noticed with incandescent bulbs.

Would be interesting to test the socket with voltage tester when turned off. (or have it tested).  Also might check to see if a 3/12 line enters the light switch box. (often used to reduce the number of lines coming from the main fuse box.) If there is, then you might have induction of current from the extra line.  I am not an electrician, but had a recent failure of one circuit from a loose wire nut on the third line of such a circuit.  When discovered, (in a wall socket), the loose wires had finally separated enough to spark and finally  burn the wire ends, and the nut and that station lost power, without tripping the junction breaker.  Could have burnt the house down. That wire was split at the circuit box, so there were two separate breakers serving two different areas of my house. If that sounds confusing,---it is.  But it happened in this house that
I have lived in for 21 years. Your electrician will know what I am talking about. >:(
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Ross77

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Re: LED bulbs
« Reply #21 on: December 26, 2018, 10:35:41 PM »

I've got over 20 Cree bulbs in my home.  I had 2 go out in my 6 bulb bathroom fixture recently.  I called Cree directly and they sent me 6 free replacement bulbs so the color temp would match.  They also suggested I check the contacts in the fixture.  Sure enough, 2 of the six were not sticking up as far as the others.  So those two bulbs were not getting good contact and apparently LEDs are more sensitive when it comes to that.

Also, if you have enclosed fixtures you need to make sure you have LEDs that are compatible for enclosed fixtures.  They will not last as long if they don't specifically say they are ok for enclosed fixtures.
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