A: There circuitry inside to boost the voltage to 300 500 volts and a triac to conduct the current but the bulbs as opposed to vacuum there is gas inside those coils.
If you are looking to use the new energy efficient light bulbs on a light dimmer you will need to buy specially made dimmable CFLs. Not all energy efficient light bulbs are compatible with dimmers so be sure to check the packaging for information.
LED light fixtures are made out of clusters of very small, super energy efficient bulbs. Because many of those bulbs are used, LED lights can be built to mimic the effects of regular incandescent bulbs. A huge part of what makes LED bulbs so energy efficient is that they do not produce heat as incandescent light bulbs do.
Energy efficient table lamps are available in many online shops such as LampPlus and YLighting. Lamps can even be made energy efficient by changing the light bulbs to fluorescent spiral bulbs.
Some of the most well known and highly rated energy efficient light bulbs are made by NanoLight, EcoSmart, Philips, and Chevron. These can be found at any local Home Depot.
For Fathers Day 2011, think about eschewing the typical gifts and giving your dad something more practical. Change out all of the light bulbs in his home with energy efficient bulbs. Because energy efficient light bulbs use much less power than incandescent light bulbs, a house full of them will drop utility bills dramatically. When choosing energy efficient bulbs for Fathers Day 2011, you will have three options. First, you can swap out the bulbs for fluorescent lights. Fluorescent lights are inexpensive, but you will more than likely have to change out all of the lamps and lighting fixtures since the bulbs are not compatible with lamps that take incandescent bulbs. Next, you can opt for the compact fluorescent lamp (CFL) bulb, which are fluorescent lights that are made to fit into traditional light bulb receptacles. Not only do these bulbs use much less energy than regular bulbs, but they will also last much longer, saving your father money in the long run. Finally, you can choose to buy light emitting diode (LED) bulbs, which are also energy efficient. Because these are new, they are more expensive on the front end, but will last longer than CFL bulbs as well as use less energy.
The most efficient outdoor light bulb would the 5 watt Light emitting Diode light bulb also know as the LED bulb. They are small lights with miniature sockets or made to fit into conventional sockets.
Modern light bulbs are made of tungsten wire.
Filament of light bulbs are made up of Tungsten.
glass and such
A light bulb is a high resistance wire surrounded by the bulb filled with an inert gas. When electric conducts through the wire, energy is lose as heat and light.
There's not a huge market for light bulbs that don't let any light out.
nobody knows