FIRST REAL DUMPING OF SNOW HERE IN MONTREAL-SOUTHERN QUEBEC
http://youtu.be/gjbArlz4Tkk
Wow that's a lot of snow.... and a LOT of boxes. Amazing you have enough power to heat all of them, lol. Do you have remote thermometers in each box to monitor temperature?
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I actually use very little power most small boxes have 1-23 w bulb(fluorescent) and I have some 9 ft palms with 46 w and the more tropical and taller palms I add an extra bulb. I do monitor 3 of my boxes out there at this property and 3 boxes at the other property . average temps in the boxes today ranged from 27F-48F--or -2C to 9C the consumption is not that bad