Grow Lab GL120 3'11" x 3' 11" x 6'7". The GrowLab Horticultural Grow Room has all the features you could ask for - and more! Outfit the GrowLab with the ventilation fan, lighting system and growing system of your choice and you will have the brightest, slickest, most affordable grow room available. Introducing the next generation in portable grow rooms - The GrowLab Horticultural Grow Room.