One city is updating light bulbs at signaled intersections, school zones, and flashing lights. The city of Anniston is updating some of its traffic lights. Calhoun County Engineer Brian Rosenbalm says the crews will have to replace the entire light head. But, the result will be much needed efficiency. Rosenbalm says the initiative to switch out the incandescent lights will take crews about 15 to 20 minutes per light over a 6 month period.