Q: Considering ive had a lower back injury in the past, is it ok for me to do barbell deadlifts as long as i start off using light weights and VERY GRADUALLY work up?

A: You definitely have to consult with your doctor and/or physical therapist. There are plenty of people who've taken up deadlifts after lower back injuries and had great results, but do not take any chances and consult your doctor/PT first. I would not recommend doing deadlifts or squats if the old injury still bothers you. If your doctor/PT clear you to do deadlifts, make sure to take as much time as needed learning proper form and, exactly like you said, use very light weights and build your way up very slowly. But talk to doctor/PT first.