where does lighting come from?
375503
Space.  No kidding.  Sprites and Elves show us that the energy is coming from way up in the ionosphere, which is the outer boundary of the Earth's electric field.  Unfortunately, all the scientists we have nowadays are stupid or the satellites have been hijacked by someone who doesn't want us to know what causes lightning. Either way, it's not official yet.  But with all the crazy weather we've been getting nowadays and with all the awesome thunderstorms that cause hundreds of thousands of cloud to ground strikes, it shouldn't be too long before somebody realizes all this energy has to be coming from somewhere other than the clouds themselves.
441585
In the house I grew up in, lights used to come on in the middle of the nights all the time.  Just randomly all the lights in the living room would turn on then in the kitchen and all the bathrooms.  It was super freaky.
635813
Thomas Edison is credited with creating the incandescent light bulb. He, however, did not create it from scratch. He improved on the designs of others. He also created the generating system to power the bulbs.
603423
Electric light is produced by running an electric current through a resistor that then glows white-hot.  Edison searched through thousands of different materials to find one that glows just right.\n\nToday most regular light bulbs use a tungsten filament (a little wire made of the material 'tungsten') which gives off a lot of light but it is relatively breakable.\n\nWhen a bulb 'burns out' it means that this little filament has burned up or broken.  It is more likely to break when it is turned on.  Technically I suppose you could get more life out of a bulb by leaving it on all the time but that would be a waste of energy and you don't want light all the time.\n\nThese days there are other materials and other ways to make light bulbs that last a lot longer but they are not in common usage yet.
240281
The electromagnetic spectrum is just a classification of the various types of light. So you are asking whether the sun uses light? Well, it certainly *emits* a lot of light and there is a lot of electromagnetic radiation (i.e. light) inside the sun, but past that, it's not clear what you want.
23843
Nope, everyone has it wrong.  There is a secret and even though we know it, we still cannot find the answer.  The questions is, "What is light."  Nobody knows what light is.  There are many theories, but none can be verified.  If we knew the answer to this question, there would be literally no limit to what could be known and done.  At one time we had no idea what electricity was, but, once we found out it's priciples and properties, look what was done with appliances and computers.  No, apply similar advances if we knew the principles of light.  A trip to Alpha Centauri (the closest star) would take shorter time to reach than Mars does now.
42364
Lighting is static electricity of charged particles in our atmosphere. The difference in the charges causes lightning. It is not often (If ever) for ground to cloud strikes over water. Water is a grounding source, since water is highly conductive (Salt water like oceans more so than fresh water like lakes and ponds.)and it is electrically, and physically grounded, the electrical energy is both grounded, and dissipated by the large volume of conduction.
991413
Throw light . \nwhy, doesn't the place get any sunlight.
523878
The moon gets its light from the sun!  Way out in outer space, the sun produces light and heat.  The sun's energy is reflected off the surface of the moon and bounced back to the Earth.  What we see is the reflection of the sun's light on the moon.
652748
It could be a form of migraine starting.  The best thing would be to check with a doctor.  For some people, certain types of lighting brings on a migraine.
817728
Light is emitted by objects that are very hot.\nLight is emitted by objects that are at very high temperatures.
713330
The light you see comes from photons emitted when an electron drops from a higher-energy orbit to a lower-energy one.  Quantum mechanics requires that the length of the orbit be an integral multiple of the wavelength of the electron's wavefunction.  That means these orbit energy levels are discrete, and so the energy difference between the levels has a very specific value, and the photon emitted must have exactly that energy and therefore that frequency.  Different elements will have different possible orbital energy levels, and therefore different emission spectra.
720731
light efficiency is measured in lux\nthe equipment used to measure it is but not limited to\nSpectral radiometers\nColorimeters\nPhotometers\nRadiometers\nPhoto-diodes
391923
the northern lights are due to charged particles from the sun interacting with the earths magnetic field, causing the atmeosphere to give of visible light.
313345
solar,  sun light, hydrogen
831388
Light Emitting Diodes and How They Work.\n\nhttp://electronics.howstuffworks.com/led.htm
220002
its done by counting how long it takes for light from the planet takes reach here. usually between a period of dark and light. same as the sun