They are VERY bright, and fit the bill, where they'll fit anyway. Looking everywhere for a one sided LED for applications where light only needs output from one side, I came across these. While I'm sure they are perfect in housings that can fit this wide of a board, they will not fit very many traditional automotive housings. They are a good centimeter or two wider than even the biggest incandescent bulb that they are listed to be able to replace.
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