all you need for your box is a little personal desktop heater. They have them at wallmart and I use one in my tent in my shed outside in the winter and it works great for small spaces. Here is a link to one
http://www.walmart.com/ip/Lasko-Products-My-Heat-Personal-Heater/16503222
Mandizig strains are always good and worth in the investment.
http://www.walmart.com/ip/Lasko-Products-My-Heat-Personal-Heater/16503222
Mandizig strains are always good and worth in the investment.