Incandescent bulbs are considered to be lower efficiency than LED bulbs because they convert a lower percentage of electrical energy into light. Incandescent bulbs generate light by heating a filament inside the bulb, which produces a significant amount of heat along with light. This means that a large portion of the energy consumed by incandescent bulbs is wasted as heat, making them less efficient compared to LED bulbs, which produce light using semiconductors that convert nearly all of the electrical energy into light. LED bulbs also have a longer lifespan and consume less energy overall, making them a more efficient lighting option.
