The Sun's & Moons Lumens & Power is bright and great enough that you don't need to have lights outdoors. Just get a farmers almanac and see when it suggest you plant for tomatoes... Plant on a full moon if possible! Cannabis cannot live if planted outdoors out of season.. I have seen people make water barriers during winter.. So when its cold out it will freeze the water barrier outside and melt throughout the inside. the plant can stay just warm enough!