i have a 1x1x2 metre high tent, usual temperature is 25 degrees celcius,(77F) there isnt much humidity as im just using a 250MH at the moment, so i was wondering if i would still keep my extractor RVK fan runnin and wen lights are out its about 15 degrees (59F)so also wondering if i should keep the fan on then or isit best to keep it on at all times regardless of humidity