The OEM bulbs on my closed trailer lasted less than 1 year. What annoyed me the most was that they were sealed units and couldn't be replaced with a 1157 bulb. A full replacement cost over $10 compared to less than a dollar for a 1157 bulb. Very bad design. So I decided to try these LED assemblies. Easy to install, bright light, less power. Very good. Must be used by the trailer manufacturer.
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