Ever realize that all those incandescent bulbs in your living space give off light at the expense of also giving off a lot of heat? You can save on your energy bill by simply replacing the old bulbs with modern fluorescent bulbs and get more light with considerable energy savings at the same time and the new bulbs even produce the same "color" of light. For example, a new spiral fluorescent bulb gives off the light of a 75 watt bulb and only consumes 19 watts of energy. The new bulb also outlasts 13 incandescent bulbs. Reducing the heat output also reduces the energy air conditioning units must remove from the air during cooling season.
In case you don't like the white light of typical fluorescent bulbs the new spiral bulbs also produce "warm" light that has the look of light from incandescent bulbs. Or you can opt for the white light if you prefer that.