Light Bulb
Light bulbs convert electrical energy to heat and light energy. An efficient light bulb converts most of the electrical energy into visible light (desirable) and very little into heat (undesirable). The majority of the light bulbs in our homes today are compact fluorescent (CFL) or light emitting diode (LED), both of which are more efficient than older incandescent bulbs. Light bulbs are specified with Watt (energy per unit time) and Lumens (light intensity) ratings. As an example, 800 lumens of emitted light would require either a 60 Watt (W) incandescent, 13 W CFL, or 10 W LED bulb. Which bulb do you think is most efficient?
Learn more about light bulbs: light bulbs and history light bulbs
Learn more about light bulbs: light bulbs and history light bulbs
Click on the pictures to explore the energy conversions of the Kid Power bike.