I wouldn't this late into the game I would just save it for the next time . More light bigger the fruit but one week here one make a difference . You can always try it and see what happens , but fucking around with lights during flower is never a good idea , tends to stress out the ladys and then they grow slowly :( . Your flowers are already formed you are essentially just waiting for them to fatten up so you can take them down and smoke em ! :) Over all in your in great shape you could add the extra light if you want thats up to you but it might stunt your plants growth from adding newer stronger light . I hope this information helps you ! -Happy Growing!