By using less energy,you can cut down on pollution. An energy﹣saving light bulb(灯泡)uses less energy to produce the same amount of light as a common bulb.
Name:Common light bulb Price of One Bulb:$1.5 Cost of Energy:Used in One Year(4 hours per day): $9. 30 Energy Used:75 watts(Most of the energy is wasted as heat. ) Life of Bulb:1. 000 hours |
Name:Energy﹣saving light bulb Price of One Bulb: $5 Cost of Energy:Used in One Year(4 hours per day):$2.50 Energy Used:20 watts Life of Bulb:10,000 hours |