I was lifting a lot last summer as part of my workout. I found that repping lighter weight with more reps significantly decreased my bf. I was not big, but I was more cut than I have ever been. This is the simple process I followed:
Each exercise:
rep 40-50% of your max for 2 minutes
follow this by repping 50 % for 1 minute
And finish with repping 70-80% for 30 secs.
I followed this up with about two hours of cardio ed( I swam for 2 hours)
I followed this with basic protein powder(muscle milk) and a tbsp of glutamine.