Light Bulbs and Artificial Lighting

I did know, but I cant remember

no, they usually use neon, xenon, hydrogen (i think) or they are most commonly a vacuum sealed tube with a tungsten filament

There are two different technologies, fluorescent, and LEDs. Fluorescent light bulbs are more common; LEDs are still too expensive for mainstream use.

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LED lamps' prices are now very competitive, certainly where I live, and make up for the unit price difference in reduced electricity consumption for a given light output. I have a mixture of incandescent, CF and LED lamps in my home, and slowly going over to LED as the existing lamps expire.

The metal paper clip will conduct electricity, so completing the circuit.

Depending what your measuring for, they are usually measured in watts just as any other light. However, you can measure them in candles and temperature as well.

About $7

Florescent light bulbs produce a similar amount of light with much less power than incandescent light bulbs. Their initial cost is paid back in energy savings. They also last a lot longer. I exchanged every light in my house for florescent bulbs years ago and I haven't changed more than 4 or 5 in all that time.

LED bulbs are now on the market and are very expensive. But they use even less power to produce similar light and last many times longer than florescent bulbs. They are quite expensive, but what you get is an almost permanent bulb. In the future we will tell our grandchildren how we used to change light bulbs and they won't understand. I see a day when the bulbs become permanent parts of light fixtures and will not be replaceable in any typical sense.

A bulb will last about six months before it needs to be changed again. Continuously turning a bulb on and off will decrease its' life span, however the average life span is about 5,000 hours per bulb.

wolfram due to its extremely high melting point

Yes, as long as you do not exceed the amount of wattage the lamp is rated for.

If the wireing is done properly you can install as many as you want until the fuse blows. A 30 amp circuit means that up to 30 amps is safe and after that it becomes unsafe and the fuse blows. You can calculate the number of 200 W bulbs that will draw 30 amps if you know the voltage. Most 30 amp circuits are connected to 220 volts. The maximum power you can draw from this circuit, before the fuse blows, is current x volts or 30 x 220 = 6600 watts. So you should be able to connect at least 32 ,200 W bulbs to this circuit and possibly 33 bulbs which would put you right at the maximum. If your voltage is only 110 volts then the max power you can draw is 30 x 110 = 3300 watts and the max number of bulbs is 3300/200 = 16.5 which of course means only 16 bulbs.

They are replaced by employees of the maintenance departments of the various corporate utility entities that are responsible for the functioning and upkeep of the towers.

Halogen

Yes, even a potato can light a light bulb.

Yes. If the batteries match the voltage of the bulb, they can light it. Flashlights have bulbs and batteries that power them. If you mean a household light bulb, then you'd need many batteries in series (80 of the 1.5 volt batteries).

Well, it depends on the size of your kitchen and the watt of the recessed light. But I think if you choose LED recessed you don't have to own many of them. For my kitchen, I only use 6 of LED recessed lights.

To do something like that you would first have to have each light on it's own smart switch. Then you would need a master switch that would control each of the other smart switches. You can find switches like this at www.smarthome.com

Yes, but it is really a wind turbine, not a windmill which used to be used to grind wheat to flour.

Not in the least, and you will still save money. A 100W equivalent will use only 20 to 25 watts, well below the 60W rating of your fixture. Much of the 60W used by the incandecent bulb is dissipated in heat. This is where the danger in over-watting fixtures lies.

It helped people see better at night and to get to work at night. Unlike candlelight, the newer light didn't hurt people's eyes as much. it was a new invention that helped the world.

I have a 2001 celica and it uses a 10watt type E bulb.

Replace the flickering light.

A 277 volt lighting fixture is one that is usually used in an industrial application. The reason for this is the voltage rating. A voltage potential of 277 volts is the voltage to neutral (ground) of a three phase four wire 480 volt distribution system. 480 volts / 1.73 = 277 volts. Rather than having to add a transformer to the system to provide 120 volts for lighting, manufactures produced a ballast for fluorescent fixtures that operates on the 227 volt potential.

Lights on water towers, radio towers, cellphone towers, and other tall structures are HUGELY expensive to purchase, operate, and replace. They should last several years, at the very least.

Yes, a light bulb is matter.