The space heater consumes 500 watts of power when it’s turned on. You’ll also encounter wattage when selecting light bulbs. To find an incandescent bulb that produces equivalent light to the ...

Efficiency is the comparison of the amount of light (lumens) produced by a given amount of electrical energy (watts). The more the lumens per watt the more efficient the bulb. The averaged ...

many people prefer them over CFLs because of their immediate and warm light. However, halogens use up to 28 percent less energy than ordinary incandescents: a 100-watt replacement bulb actually ...