true.....course i grow under lights and not in windows so i dont have that problem....cant over heat a plant under T8's .......window temps swing to bad for me........its 110 out in the summer.....-60 during some winter nights.......i dont throw anything in a window i aint willing to lose.....only thing in windows are capensis, binata, unknown ping hybrid and sandersonii.....course they are also within reach of any kid that walks into the paper......for anything rare that i want to keep i want a fairly stable environment......my basement under lights provide that.....