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Never had a problem with mine at around zero C, and they keep dew off well due to their generated heat. But it's a good idea to cover them with a 'tent' of some sort (I use one of those large clear storage boxes, on its side, with some holes punched in the walls to allow ingress of cables - works a treat).
Last edited by Amaranthus; 28-01-2015 at 04:37 PM.
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