Unless the bulbs were touching the plant, that is not burn from the bulbs. I keep my CFL bulbs like 1/2" from the tops of my plants. They will not burn unless they are touching the plant.
I use 26watt CFL bulbs and have never had them burn a plant unless the actual bulb is touching the plant.
Also, make sure you use nutes on your next run. You will have much better results. Not ony will your yeild go up, but the quality of the buds will be better. Its like asking an athlete to put on muscle without giving them the food they need. Its a bit tough to do. But when given the proper nutrition, the athlete can work out and put on some mass, just like your plants will do with the proper nutrition.