Light Bulbs (Incandescent) Landfill Cart Don't Mix with Glass Recyclables The materials used to make incandescent bulbs are non-toxic, so it’s OK to throw these bulbs in the trash. Although they are made of glass, don’t recycle them with glass. Did You Know? Which Bulbs Are More Energy Efficient Than Incandescent Lamps? 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.