Most people do not really pay too much attention on lighting as they think that your lights are not consuming lots of energy. Light bulbs can have a huge effect on your monthly payments because they can consume a lot of energy if they are used often. If you're using incandescent bulbs, you should replace them straight away with CFL or LED bulbs.
This will likely be a issue to the individuals who're not making use of solar and wind energy as their alternate supply. These options are pricey so some individuals could feel that they're not going to benefit typical homes.