can I use ordinary wiring merits to join aluminum and copper wire together to wire up led flush mount lights. Is there a product that will protect the joining of aluminum wiring and copper wiring ?

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    What makes your think they're aluminum? That sound highly improbable... – Harper May 13 at 15:52
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    What you think is aluminum may be copper wires that have been tinned. – manassehkatz May 13 at 15:58
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    Where "tinned" means "coated with solder, which is a silvery colored alloy, but not aluminum." It's pretty close to inconceivable that NEW fixtures (or LED fixtures, which are "new enough" even if used, in this context) would have aluminum wires. – Ecnerwal May 13 at 16:08
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    Very cheap Chinese components may also be made with aluminum wire. But those would not be UL-listed, so we shouldn't be talking about them. – Harper May 13 at 16:13
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    Twist-on connectors are also known as wire nuts, wire connectors, cone connectors, or thimble connectors. One trade name for such connectors, Marrette, is derived from the name of their inventor (see History) and, in Canada, this type of connector is often referred to as a marrette regardless of the actual brand of the product. – Fresh Codemonger May 13 at 16:21

Although I doubt you have aluminum wiring in a new device (probably tinned copper). You can join aluminum wire to copper wire with alumiconns. These are special wire nuts that have a special jell inside and these are 1 use only (alumiconns are usually purple or the 2 brands I have used are purple) for example the box I have on the shelf is ideal brand Twister AL/CU, these are listed for aluminum to copper wire connections. Regular wire nuts create a fire hazard with copper to aluminum connections so it can or needs to be done with alumiconns. I would bet you have tinned stranded wire coming from the new fixture. If you take a knife and scrape the wires there will s probably copper under the tin. If copper under the tin you can just use a standard wire it that is the correct size for the wire.

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