A: Definitely not if they do then we have perpetual power. To achieve that the system must be 100% efficient and that is impossible
Battery-powered lights such as flashlights and motion-activated spotlights can be useful in places electricity isn't available. These lights can be purchased in department stores such as Amazon and hardware stores such as Home Depot.
There are numerous types of lights that can be used. Flashlights and the light sticks that can be cracked to release light can be used. Also solar powered lights, push button stick on lights, and lights that can be run off a generator are options.
flashlights, lamps, street lights
Flashlights exist so you can have a portable light source. You can use flashlights where there are no other types of lights. You can use them in emergencies, and you can use them in places where other types of lights would be awkward or hazardous.
because it includes flashlights and lights
Vector flashlights are among the brightest flashlights in the world. They utilize a Krypton beam and long-lived LED lights. They are considered useful in emergency situations when a very bright light is needed.
It's best not to turn on lights or anything that uses electricity other than flashlights. Flashlights are okay. Or if you don't want to, you could also use candles. If necesarily, have the lights on. Nobody is being forced to have lights off.
Examples are lightbulbs,neon lights, traffic lights,headlights, concert lights.
Charles Fritt created a solar powered led lights.
There are flashlights that are powered by a generator that you turn with your hand. Some lights, known as a shake light, are powered by being shaken back and forth. Your mechanical energy is converted to electrical energy.
Surefire flashlights can be used for a variety of purposes. This company manufactures lights for wristwatches, helmets, weapons, law enforcement, and fire rescue, for example.
Light bulbs, flashlights, lights, sunflowers...... anything with the word light or sun in it!!!!