you could, but i wouldn't suggest anykind of trimming now that your plant is in flower.. if you had wanted to do any trimming, you should do it a week or two before your going to flower so that the plant will have time to recover from any stress from the trimming... trimming now will cause stress to the plant and stress is a number one way to cause hermies in your baby, which i am pretty sure you don't want to do...
you could always get some small cfl's and place them around the bottom of the plants to that they recieve more light down low instead of trimming...