... watts40 watts 7 watts60 watts 13 watts75 watts 22 watts100 watts 27 wattsReplace Incandescent Lamps with Halogen Lamps Lasting two to four times longer than a standard light bulb, halo-gen lamps ... energycosts by an average ofabout 30 percent.KIDDIE U., a 15,400 square-foot daycareand learning facility in Orlando, Florida, hasthe lowest energy costs per square foot ofany comparable facility ... fixturesto accept halogen lamps typically pay for themselves in less thanthree years in energy savings alone if fixtures are used at least twohours a day for screw-in retrofits or eight hours a day for...