Can a light power itself?
829486
Of course not; that would be akin to perpetual motion.  Of the energy used by a lamp, between 5% for an incandescent light bulb to nearly 30% for the best fluorescent tube ends up in usable visible light, and at the other end, the best (and quite costly) solar cells convert 18% of the light in electricity.  So, assuming ALL the light from the best lamp is directed to the best solar cell, you get power back at the rate of 5.4%.  It will get dark pretty quick...
176518
Light bulb uses light waves.
175649
It will need some kind of electric source, or it won't do anything. They are really cool, though.
287343
I would probably use Light Emiting Diodes connected to a low voltage dc source using very small gauge twin-lead wire.
173110
attach a light bulb to a battery and have current pass through the different cups, the more current the brighter the light.
941040
I believe the light bulb would light up the sphere, like a lamp shade, You'd see the light but not the light bulb. The metal particles that are in a one sided mirror allow some light to come through.
686453
u can use switchs to power each one at a time but u ll need to place them in a parallel format cause using serial means u have to power the first bulb to be able to light any other ,other than that u can use relays and connect them in a way to have the light going in a sequence
361367
atach a wire to each part of the batter, attach them to the light. create a circuit and you will have light
947452
Not likely, the current isn't strong enough.
230512
There is a piece of hardware in the back of the computer called a Power Supply. It converts the electricity from the wall into something the computer can handle. The Power Supply also has a off switch. If you hit that all electricity ceases to your computer, thus making it impossible for the computer to turn on. When that light is on it means the computer is receiving electricity.
1001733
It sounds like you are creating a basic electrical circuit. with the batteries, wires, bulbs and paper clip you can make either a series or parallel circuit. The light bulbs will light up when you have a complete single loop for series. When you measure the current it should be the same anywhere on the circuit. In a parallel circuit you are splitting the circuits into three or more branches, with one bulb on each side. When measured each branch should be using half the current. You shouldn't have any problem finding a site online that shows this experiment. use keywords, including science experiments for kids. I found the experiment in Reader's Digest,"How Science Works"
231919
Cool question.\n\nTake a sheet of aluminum foil and cut it into a thin strip.\n\nTape the metal tip of the bulb to the tip of a flashlight D battery. \n\nWrap one strip of foil around the screw part of the bulb.\n\nNow touch the foil to the bottom of the battery.\n\nThis is a simple circuit!
442259
No it is not possible at this time and I doubt anyone will ever attempt it for a couple of reasons.  From NASA's webpage you can read the rest by clicking on my sources link\n\n1. Most of the power in lightning is dissipated as thunder and light, which cannot be easily harnessed to generate electric power.\n2. However, even just the electrical current of lightning is considerable -- 20,000 amps on average, the same as 100 steel welders. But the power is on for only a brief fraction of a second, so the total power is actually small, only enough to power a 100-watt light bulb for six months.\n3. The huge surge of electrical current over very brief times makes storing the energy impractical.\n4. Lightning strikes to specific locations are infrequent and inconsistent. This makes scheduling power availability impractical.\n5. Lightning can be very damaging. The collection systems have to be incredibly robust, which would drive up costs. Lightning is also very dangerous, making it tough on the collection system workers.\n6. Lightning would have to be collected over a huge area, making the system impractically expensive.\n\n#3 Its saying that lightning comes with an extreme burst of energy in a very short amount of time.  When it comes to electricity it takes awhile to build up, electricity created by a damn for example is created by the water and the turbines, it builds up slowly and is put into its reserve where ppl then draw from it.  If there was to be a massive spike were the water all of a sudden speed up to even 100mph the turbines would overheat and become useless.  Imagine charging a battery, instead of putting it on a charger and gradually letting it build up you just zapped it with a tazer or something.  Its not going to charge its going to explode.  Therefore it is impractical to store it becuase we have nothing that could take such a massive amount of energy in such a short time
724931
Dont wait for the light to appear at the end of the tunnel.\nStride down there and light the bloody thing yourself.
1177002
yeah you can use a switch (voltage switch) or if you can use binary logic, need to know how much voltage/current you are dealing with
802847
The lower the resistance of the bulb, the more power it will consume.
306346
I guess so.. That's kind of stupid though. Why would you want to change a lightbulb with your feet? Once you get the bulb situated to where it stays in the socket without falling, then it would be pretty easy to keep it rotating until the electricity can circulate throughout the bulb. Try it...