Energy Efficiency of Light Bulbs Modern light bulbs are more energy-efficient than old incandescent bulbs, especially LED bulbs. For example, LED bulbs use 90% less energy, CFL bulbs use 60-80% less energy, and halogen bulbs use 20-30% less energy than incandescent bulbs. Modern light bulbs last longer too.

There are a number of different types of low-energy light globes on the market including LED (light-emitting diode), Halogen and Compact Fluorescent Lamps (CFLs). In comparison, LEDs use less energy than CFLs or Halogen globes but still produce the same amount of light. They cost a bit more but last a lot longer, which will save you money.