LED bulbs are typically the better option for long use because they draw less power than older incandescent bulbs. That can matter over time for household energy use, especially in homes where multiple lights, appliances, and electronics are left running overnight.
Still, if no one actually needs the light, turning it off is the simplest way to save energy and extend bulb life. Small savings may not transform an electric bill, but efficient habits across a home can add up.
Better Options for Nighttime Visibility
If the goal is simply to avoid walking through a dark kitchen, the range hood may not be the best tool for the job. A plug-in night light can provide softer illumination at floor or counter level. A motion-activated light can turn on only when someone enters the area. A dimmable smart bulb may also help if the fixture supports it and the bulb meets the hood’s requirements.
These alternatives can reduce unnecessary light, limit electricity use, and make the kitchen more comfortable at night without relying on the stove area as the main source of visibility.
The Bigger Picture
Leaving a range hood light on overnight is not automatically unsafe or unreasonable, especially with the correct LED bulb. The better question is whether it serves a real purpose in your home.
If it helps with safe movement at night and does not disturb anyone, it may be a reasonable choice. If it is just left on out of habit, a lower-cost lighting option or a simple switch-off routine may make more sense.
In the end, the right answer is less about the light itself and more about how your household uses the kitchen after dark.