LED lamps have been advocated as the newest and best environmental lighting method. According to the Energy Saving Trust, LED lamps use only 10% power compared to a standard incandescent bulb, where compact fluorescent lamps use 20% and energy saving halogen lamps 70%. The lifetime is also much longer — up to 50,000 hours. A downside is still the initial cost, which is higher than that of compact fluorescent lamps. COUNT 4
QSN1 How much more power does a standard incandescent bulb use compared to LED? ANS1 10% QSN2 What is the average lifetime of a CFL? ANS2 50,000 QSN3 What is the average lifetime of a CFL? ANS3 50,000 hours QSN4 How much power does a halogen lamp save compared to a standard blub? ANS4 70%