LOL... 40 watts haha may as well make a stand and set it under the lamp shade in your house lmfao.... when i grew my first successful plant ever i used about 1000 watts lol... the higher the wattage and amperage the better your plant will turn out... i may be only 16 but ive tried to grow with a 40 watt fluorescent light the results ended up to be garbage maybe 7 g's to a 40 watt plant ive heard of people getting more but its almost like legal weed... almost no thc maybe 5 % of the thc actually was in there had to smoke it all to get a buzz