Ah ok. If you are in the tent it shouldn't affect your plants, the fluctuations. My plants kind of hibernated this winter... they went on a go slow and were stunted, but that was window weed, with temperatures well below 13 degrees C, the point at which they stop processing nutes I believeI only grow indoors so the tent is 28°c continually. But the outside temp swing is bad lately, this morning was only 8°c, but tomorrow is 33°c.