To power a light bulb with a battery, you need to establish a circuit that allows electricity to flow through the bulb and produce light. This circuit consists of three essential components: a battery, a light bulb, and a conductor. The battery provides the electrical energy that powers the light bulb.
Learn more... Lighting an LED light bulb up with a battery is a fun experiment you can do to learn about electrical circuits and direct current (DC) electricity. It’s not a practical way to power an actual light source, as regular batteries do not supply enough voltage to power a strong enough light bulb.
To increase the voltage and power output, you can connect multiple batteries in series. This involves connecting the positive terminal of one battery to the negative terminal of the next. If the voltage provided by the battery is too high for the light bulb, you can use a voltage regulator to reduce the voltage to a safe level.
Attach the 9-volt battery again and tuck it inside the lamp. Then just put the lamp back together. We stuck the felt piece back on and added some velcro so it stays on but is easily removable to change the battery. We had most of this stuff on hand, the only cost to us was the strand of LED lights.
Acquire a small low-voltage LED bulb of 3V or less. Regular-sized light bulbs, like those used in lamps or ceiling fixtures, typically require 120V or more to run them. A normal household battery won’t provide enough power to light these larger types of bulbs up. You can use a small LED bulb from a flashlight, for example.
Keep in mind that if you use too many batteries to power just 1 light bulb, you could blow it out. For example, if you use 6 1.5V household batteries to power a single 3V light bulb, it might blow out. This is not dangerous to you, but the light bulb won't work anymore.