Question

light bulbs vary significantly in their efficiency. which is the least efficient light bulb? fluorescent light bulb led light bulb incandescent light bulb

Explanation:

To determine the least efficient light bulb, we consider the energy conversion and efficiency of different bulb types. Incandescent bulbs work by heating a filament until it glows, converting most of the electrical energy into heat (around 90%) and only a small fraction into light. Fluorescent and LED bulbs are more efficient as they convert a larger portion of electrical energy into light, with less wasted as heat. So, the incandescent light bulb is the least efficient among the given options.

Answer:

incandescent light bulb