I have been forced to move my 4 plants indoors, because of frosty mornings and 4 inches of snow yesterday. They are under the only light I have, and that is a 400 watt metal halide bulb @ approx 14" above the tops of the plants. The crawl space that they are now in is a constant 10 degrees celsius and I am wondering if I need to add HEAT? The plants are now entering their 7th week of flowering. The light itself is not giving off of a lot of heat, and neither is the ballast. Some help with this matter would be greatly appreciated. Thanks pictures to follow, it's dark time now