I installed these solar strobe lights on our 7 lifebuoys in our lakeside community and they work great. I've been using them for many years and they usually last 3 or more years all year round. I've looked for "commercial" strobe lights designed for the same purpose and they're usually (at least) 10 times more expensive than them and have about the same lifespan in my experience. A bright strobe light is visible at least a kilometer away, but doesn't bother local residents. All I had to do was find a way to attach them, which was relatively easy with PVC fittings.
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