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Also it seems people only have problems with water with Luxos and maybe IQ-X, not Cyo? I have two Cyos, the older one is five years old and has spent the nights out too for a winter and both have been through plenty of long rides and commuting and there's been no problems. The construction isn't sealed but has been reliable. I think it's bright enough for mountains and gravel too, but I read somewhere that the Edelux uses different led.
Yep but its the shell that matters if the water is going in, right?