They are great and I use them as boat lights. The light produced at really low voltage is impressive but the thin wires coming out of the device are problematic as they are very small and the use of 18/20ga wire makes connection difficult. Not being an electrician, this is difficult but not insurmountable. These blocks are sealed (aren't they waterproof?). The mounting screws they give you are almost useless unless you attach them to a tree.
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