Overall they work as intended however as many others have said the waterproofing of these devices is pretty poor. For the price you get what you pay for. In the end I just removed the lens cap, applied a small bead of clear silicone to the rail as well as the screw holes, then screwed them back together and applied some silicone to the screw heads along with the cable insert (see pictures). This will definitely help ensure each unit is a lot more waterproof than supplied, but is it worth the effort? It took me about 10-15 minutes to fix all four indicators so in my case I would say it was worth it. the lights.
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