LEDs are generally more energy-efficient than incandescent bulbs.

• A. False
• B. True
• C. Not necessarily
• D. Depends on model

Answer: (B)

When it comes to energy efficiency, LEDs win because they convert most of the electrical power they draw into light rather than heat. An LED’s design focuses energy toward emitting visible light, with very little wasted as heat. In contrast, incandescent bulbs generate light by heating a tungsten filament until it glows, so a large share of the energy becomes heat rather than useful light. For the same level of brightness, an LED typically uses only a fraction of the watts of an incandescent bulb. For example, producing about the same brightness as a 60-watt incandescent might only require around 8 to 12 watts with an LED, depending on the specific product. This efficiency also often comes with a longer lifespan, reinforcing why LEDs are the standard choice for energy savings. There can be variations among models, but the general pattern is clear: LEDs are more energy-efficient than incandescent bulbs.