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Front view of LED lamp Now repared.

Front view of LED lamp Now repared.

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I had a closer look and it is feasible that there could be continuity from the mains to the connectors to the LED chips which could be a hazzard. The mains is not isolated with a transformer.

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Filename:085.JPG
Album name:migette1 / Migette1
Keywords:Lamps
File Size:172 KB
Date added:Jan 02, 2014
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Prismatic
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Manuel


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Jan 08, 2014 at 04:30 PM Author: Prismatic
At least you are now aware about the danger of this but I think this is unbelievable.

Prismatic@YouTube:

http://www.youtube.com/slprismatic

migette1
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Peter


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Jan 08, 2014 at 05:30 PM Author: migette1
Thanks Manuel

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

Medved
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Jan 08, 2014 at 11:18 PM Author: Medved
Having LED's not insulated from the mains is quite common and it is well safe, when the LED's are properly covered and insulated form anything you may touch.
It usually lead to way lower losses in the ballast (usually less than half compare to an insulated design) and allow to really skip all electrolytic capacitors, so get rid of their limited life and temperature sensitivity problems, so allow to reach the lifetime above 20k hours. Or it allow to make really simple and cheap ballast, mainly for low power below ~3W. But as I wrote, the drawback is the need to cover/insulate the LED's...

On such "MR16" lamps is usually a cover glass, what prevent the LED's from being touched. I would guess originally it was here too, but poorly attached, so it fell off.

And to be honest, on these cheepeese designs I more trust the glass (you directly see, whether it is missing or so), compare to the quality of the transformer and mainly the PCB layout (I've met distances between primary and secondary less than a milimeter or single foil layer and no side protection in the transformer) on lamps with metal heat sink...

No more selfballasted c***

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