Which Bulbs Are More Energy Efficient Than Incandescent Lamps? November 18, 2015 Email LED lights are more energy efficient than incandescent and CFL bulbs: They last 50 times as long as traditional incandescent bulb and use 80 percent less energy. Fluorescent bulbs last three to 25 times longer than incandescents and use anywhere between 20 and 80 percent less energy.