Both of the other growers are correct though I dont think its been explained very well as hempkid says more light will equal more yield though its not the only way. What worked for me is a brand new nutrient range called gen1:11 and like the first grower said the feed contains natural organic extracts that are like powerhouses for our plants giving them extra sugars and amino acids so they have more energy to create bigger denser buds and if blooming works lol I would advise it otherwise lol personally the key to a good yield is working very hard on yor enviroment humidty ect and then selecting a good souce of lights and good nutrients and you should be well on your way I personally just cropped 9z fom 2 plants using Gen 1:11