If you raise the light a little the plant will stretch some and grow taller. That way you get more buds. There is a balance that needs to be played out between stretching for height and closeness of the light to the lower parts of the plant. It does take a certain amount of stretch to grow them big and heavy. To flower you move the light closer then in vegetation cycle. During vegetation cycle you want the plant to stretch some so you have more room for flowers to form.