Good product, super bright. If you plan to run them near full power they will need a heat sink. Just playing with one of them some of the magic blue smoke started coming out when I adjusted a potentiometer to approach full power. Quickly disconnected it and it actually still worked after it cooled down. I considered rating at 4 stars since there is no heat sink included but that didn't seem appropriate, although it would be nice if there was a package offered that did include them.I would purchase more if I needed them.
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