lumens = brightnesswatts = energy. Light bulbs are getting better. Newer bulbs â like halogen incandescents, CFLs and LEDs â last longer and use less energy than traditional incandescent bulbs, saving you money on your energy bills.umens = brightnesswatts = energy. Light bulbs are getting better. Newer bulbs â like halogen incandescents, CFLs and LEDs â last longer and use less energy than traditional incandescent bulbs, saving you money on your energy bills.