Adding to the comments of magic, I also believe that at the end of the budding stage you may not see much physical difference in your plant's bud size, but there might be an increase in the amount of resin they contain. One of the purposes of the resin (apart from catching pollen) is to protect the leaves from the brightness of sunlight when it is too strong and so, by putting them under a brighter, hotter, more intense light than cfls and fluoros you may see an increase in potency. Even if this is wrong it might make you feel better!