So how cold does it get up there? You might have to put it in Farenheit for me as you Brits have weird measurements, or maybe it is us that does things backwards :wtf: my space is in the garage (colorado!) and at times I have to use a small space heater..even so temps have gotten as low as 50F at night with no visible problems. That is the very lowest I want to go though; plants in their natural environment - outside - are always going to subject to varying temps day vs. night, the idea is to minimize the high variations indoors. good luck