Description Cool Tubes can lower temperatures in your grow room by up to 10 degrees. Using cool tubes allows you to place your globes much closer to your plants without burning. They are also suited for floor lighting. Growers can position them upside down with the light shining up underneath the plants. The globe is fully shielded within the glass tube and all heat can again be vented straight out of the room! It is important to blow the air along the tubes and to not suck the hot air through the fan. The extra heat forced through the fan could cause it to overheat and fail.
