Basically, an incandescent Bulb is a simple device - just a tungsten wire sealed in a glass tube. The electric current passing through the wire heats it to incandescence, and the wire produces light. Suppose you took a dark piece of metal. If you heat it in a furnace, it becomes hot and radiates heat, but at first shows no visible effects. As temperature is increased, it turns a dull red, therefore emitting not only heat, but also some light.

It is essential that you change your UV lamp annually. The ability of the lamp to emit UV light decreases over time. Remember - UV light is invisible! Even though the lamp is still glowing after one year, there might not be enough UV light reaching your water to be effective.

UV does not kill microorganisms like chlorine does, but instead UV inactivates them. UV light at a specific wavelength of 254 nm is readily absorbed by the genetic material of microorganisms. The DNA strand is coded with a specific sequence of something called base pairs. The sequence of these base pairs codes for certain characteristics. UV light at 254 nm is readily absorbed at the point on the microorganism's DNA strand which codes for reproduction.

Both regular incandescent bulbs and halogen bulbs create light by heating a filament (made of tungsten) inside the bulb; the heat makes the filament white-hot, producing the light that you see. Usually, the bulb burns out when the filament wears out. The filament on a regular incandescent bulb wears out over time because the tungsten on the filament evaporates and is redeposited on the bulb's glass.

The wire inside a light bulb is called a filament. It is made of tungsten, a metal that stays solid at very high temperatures. Electricity flows through the tungsten filament, causing it to heat up and glow. The glow gives off light. Inside a light bulb is a vacuum – in other words, all the air has been removed from inside the glass bulb. (If there were air inside, the wire would burn up.)

A fluorescent light bulb is a high efficiency lamp that uses an electric discharge through low pressure mercury vapor to produce ultra-violet (UV) energy. The UV excites phosphor materials applied as a thin layer on the inside of a glass tubes which makes up the structure of the lamps. The phosphors transform the UV to visible light.

Fluorescent light bulbs (including compact fluorescents) are more energy-efficient than regular bulbs because of the different method they use to produce light. Regular bulbs (also known as incandescent bulbs) create light by heating a filament inside the bulb; the heat makes the filament white-hot, producing the light that you see. A lot of the energy used to create the heat that lights an incandescent bulb is wasted.

The first compact fluorescent bulbs flickered when they were turned on because it took a few seconds for the ballast to produce enough electricity to excite the gas inside the bulb. Thanks to the refined technology in our new GE compact fluorescent bulbs, there is now no significant flicker (less than 1 second). However, these bulbs do require a short warm-up period before they reach full brightness, which is why they may appear dim when first turned on.

The primary difference is in size; compact fluorescent bulbs are made in special shapes (which require special technologies) to fit in standard household light sockets, like table lamps and ceiling fixtures. In addition, most compact fluorescent lamps have an "integral" ballast that is built into the light bulb, whereas most fluorescent tubes require a separate ballast independent of the bulb. Both types offer energy-efficient light.

Due to the high temperature the tungsten filament is operated at, some of the tungsten evaporates during use. This evaporation leaves the filament thinner on some areas. The weakened area of the filament becomes hotter, which leads to even faster evaporation causing the filament to burn back and the lamp to burn out.

Just one, as long as you explain it's Plug-N-Play... they get confused if it doesn't come with a driver disk.

to share similar experiences of changing light bulbs and how the light bulb could have been changed differently. to write to the list administrator complaining about the light bulb discussion and its inappropriateness to this mail list. to post that this list is not about light bulbs and to please take this e mail exchange to alt.lite.bulb to demand that cross posting to alt.grammar, alt.spelling and alt.punctuation about changing light bulbs be stopped.

Please stop asking silly questions. The FF site is here to entertain our visitors with games, not jokes.

Over the life of an incandescent light bulb the filament begins to deteriorate and the particles will settle on the inside of the glass. In return the bulb will take on a grayish appearance and a slight decrease in light output may occur. For fluorescent bulbs only the ends will blacken as the bulb is burned. Each time the lamp is turned on and off the emissions material settles on the inside of the glass. Extreme darkening generally indicates the bulb is about to burn out.

Compact fluorescent light bulbs may generally be used in enclosed fixtures as long as the enclosed fixture is not recessed. Totally enclosed recessed fixtures (for example, a ceiling can light with a cover over the bulb) create temperatures that are too high to allow the use of a compact fluorescent bulb.

Intense Pulsed Light (IPL) therapy is an effective way to rejuvenate the skin, giving it a more youthful appearance. Light-based treatments use a less-intense, broader spectrum of light than lasers, but are effective in treating rejuvenation of the skin. Candela's Ellipse I2PL is the only light-based product that is built specifically to dual-filter light as it is absorbed, thereby generating more consistent results.

Energy saving light bulb 20W is 1200lm, and the light power of a 100W bulb is 1380 lm. From it you can see that the compact fluorescent light bulb 20W with in light power would be approximately equivalent to a "87W light bulb". bulbs of this performance level are not available on the market, it was decided to select for the pictogram on the outer packaging the nearest possible comparable output level in light power of conventional bulbs.

Energy saving light bulb 20W is 1200lm, and the light power of a 100W bulb is 1380 lm. From it you can see that the energy saving light bulb 20W with in light power would be approximately equivalent to a "87W light bulb". bulbs of this performance level are not available on the market, it was decided to select for the pictogram on the outer packaging the nearest possible comparable output level in light power of conventional bulbs.

This types of bulb only converts 10% of the electricity they use to produce light, the remaining 90% is converted into heat.

A Mosquito Magnet ® is a commercial biting insect abatement system. The device uses a standard 20-pound tank of propane to emit a warm, moist stream of carbon dioxide, heat, octenol attractant (registered EPA pesticide) and moisture that pests mistake for the exhaled breath of their warm-blooded prey. As the insects approach the source, they are vacuumed into the net where they dehydrate and die. In 4-6 weeks, the breeding cycle is interrupted as egg-laying females are destroyed.