If you still incandescent bulbs, you should try changing your lights. These bulbs generally discharge 98 percent of the energy that they up into heat so you must consider CFL or LED bulbs.
If you these renewable energy options long with your existing energy supply, your bills will go down substantially. Your monthly bills will certainly be lowered if you'll this.
You must try switching your light bulbs if you're still utilizing incandescent bulbs. It's always better to choose CFL or LED bulbs because the incandescent bulbs release 98 percent of the energy that they consume to heat.