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Old 04-16-2011, 07:58 AM   #11
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The only components on that board are the LEDs (which do get hot when running) and micro-resistors. Resistors "pop" with a puff of smoke and since an LED is a light emitting diode (and I have see diodes blow), they also "pop" and emit a bit of smoke. Neither component will start a fire.

However a computer Power Supply most definitely will. My 450 Watt power supply failed one night. I knew because I leave the PC running 24/7 and just shut off the monitor. I came in in the morning and my PC was DOA.

When I pulled the Case away from the wall to troubleshoot, there was a huge black mark on the plaster where a lick of flame and smoke had come out of the fan vent. There was very little beyond that initial burst of bad stuff. The smokes did not go off (I have a centrally monitored system) in the hall. I was lucky there were no papers or other trash around or behind the unit at the time (like normally ). Since the supply was "toast" I opened it up and a big ripple capacitor had burst.
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Old 04-16-2011, 08:03 AM   #12
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Did you change the fuse size in your house to prevent it from happening again?
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Old 04-16-2011, 08:05 AM   #13
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Did you change the fuse size in your house to prevent it from happening again?
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Old 04-16-2011, 08:25 AM   #14
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Just messing with ya !!
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Old 04-19-2011, 04:09 PM   #15
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Did you change the fuse size in your house to prevent it from happening again?


I just switched out 50% of my bulbs for LED and I almost started to worry .. I to have never seen an LED bulb burn and I've been using them in projects for several years.

The only mistake most people make is not paying attention to the color temp and ending up with Daylight LED's instead of Warm White LED's. The ladder is a more suitable incandescent bulb replacements in an RV's.

Warm White = 3000 Kelvin
Neutral White = 3500 Kelvin
Cool White = 4100 Kelvin
Daylight White = 5000+ Kelvin.
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Old 04-19-2011, 04:41 PM   #16
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The only components on that board are the LEDs (which do get hot when running) and micro-resistors. Resistors "pop" with a puff of smoke and since an LED is a light emitting diode (and I have see diodes blow), they also "pop" and emit a bit of smoke.
OK, question seeing as I know you have quite the setup for LEDs. I just bought some new LED bulbs and installed them yesterday. When I took the cover off the lens; there was a very small amount of smoke. Like small enough that I wasn't sure it wasn't my eyes playing a trick on me. I put the cover back on and waited 5 more minutes; and there was that tiny amount of smoke again.

Do your LEDs do that too? Or is this a sign that I shouldn't be using the ones I bought?
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Old 04-19-2011, 07:23 PM   #17
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OK, question seeing as I know you have quite the setup for LEDs. I just bought some new LED bulbs and installed them yesterday. When I took the cover off the lens; there was a very small amount of smoke. Like small enough that I wasn't sure it wasn't my eyes playing a trick on me. I put the cover back on and waited 5 more minutes; and there was that tiny amount of smoke again.

Do your LEDs do that too? Or is this a sign that I shouldn't be using the ones I bought?
My LED pads DO NOT smoke.
They know it causes cancer.

Seriously though, A photo of the type you installed would be helpful.
Are you sure they are 12 volt?
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Old 04-19-2011, 09:08 PM   #18
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OK, the bulbs I bought are these ones: Link

I've attached a few pictures, bassically showing what they look like on, off, detached, and compared to a regular bulb. (May not look it, but I'd say the LED is about 75% as bright.)

Now of course tonight I couldn't see any smoke; so I'm wondering if there was some residue on the bulbs from manufacturing, and that burned away yesterday. I'm heading back into the trailer now to see if leaving it longer helped.
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Old 04-19-2011, 09:30 PM   #19
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That was my thought as well. Oils on the unit burning off. Also the upper LEDs are quite close to the metal shields and could be overheating.
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Old 04-20-2011, 01:20 AM   #20
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In my (limited) past experience, if something was going to pop, it was the resister in front of the led. In your bulbs I believe there is one resister for each row of the three led's.

I don't see any led's out, so I doubt if any smoke you may have seen was the result of any failure.

Because of the design of the bulb and the way it's mounted in the fixture, a little less than half of the light is reflected light. There will be more heat reflected back to the bulb on top, but I don't think it is a problem. If I were to use a bulb of this design, it would be in the type of fixture that is more like a table lamp where the light is desired to radiate 360 degrees.

I installed the lights that herk7769 suggested not only for the fact that they're a great price, but they all fire downward in the fixtures I installed them in. Their easily as bright, and cover the area sufficiently as the bulb they replaced.

On the fuse issue, I'm considering fusing each fixture with an in-line miniature blade type of fuse, depending what other usage is on the same circuit (ie; I just added a Fantastic Fan and took the power from one of my ceiling fixtures). Plenty of room in the lens and very simple to install/change.
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