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.

Eye Saver is an incandescent bulb. NASA conducted research with other light sources but found the incandescent light bulb is the best light source for this application because it produces the maximum amount of light with less glare. (back to top)

An incandescent bulb is highly inefficient and requires 10 times more energy than an LED. The capacitor in NightStar can only power a filament light bulb for a few seconds. By comparison, the energy stored in a battery is great enough to power inefficient devices for several hours. However, when a battery's energy is depleted, it either has to be discarded or recharged. Rechargeable batteries require external and often costly charging devices.

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.)

Halogen bulbs are more efficient than ordinary incandescent bulbs. They can give a longer lamp life expectancy because of the halogen cycle.

The life of incandescent and halogen light bulbs, referred to as tungsten filament lamps, is limited by the state of the filament. The filament is the wire inside the bulb that produces light when heated. The light bulb will not work if the filament is broken which may occur as a result of the application of force, such as dropping the bulb, or by lack of tungsten in a particular area over the filament.

Halogen bulbs produce a whiter light and are 10 to 20% more efficient than regular incandescent bulbs. Halogen can produce more light with a smaller bulb, and are often used in modern fixtures with sleek designs. Both types of bulbs can last as long as 6000 hours on average, but halogen bulbs tend to be more expensive to replace. If you need more light from an existing lamp there are halogen bulbs designed to replace most regular incandescent bulbs.

During use, tungsten from the filament evaporates into the gas inside the light bulb. When the tungsten comes in contact with a cool surface it will condense. Often, with incandescent products, the tungsten condenses on the bulb wall, eventually accumulating, and causing darkening of the bulb. Halogen light bulbs eliminate the bulb darkening because halogen light bulbs have a special gas inside their bulb containing halogens.

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

Halogen is a type of incandescent lamp. It has a tungsten filament just like a regular incandescent that you may use in your home, however the bulb is filled with halogen gas. When an incandescent lamp (one which produces light by heating a tungsten filament) operates, tungsten from the filament is evaporated into the gas of the bulb and deposited on the glass wall.

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.

the filament temperature of an incandescent bulb is increased, it will reach the point where the tungsten metal vaporizes and combines with a halogen (iodine or bromine) to form a gas within the bulb. As the gas decomposes, depositing the?tungsten?back on the filament, a halogen bulb emits a bright yellow light with a color temperature close to that of direct sunlight.

one time, the Edison group(think tank) held over 2000 patents for items developed under Edison's guidance. Several well known Edison invented devices: Telegraph, movie projector, phonograph player(which now looks like a CD player).

Yes, conventional incandescent dimmers will work to dim halogen lamps. However, the effectiveness of the halogen cycle to keep the lamp walls clean and give longer life may well be affected. This cycle depends upon correct lamp operating temperatures, which of course will be changed when the lamp is dimmed. Therefore, using a dimmer may not extend the life of your halogen lamp as much as a dimmer typically extends the life of a standard incandescent lamp.

Response: A halogen bulb is often 10 to 20% more efficient than an ordinary incandescent light bulb of similar voltage, wattage and life expectancy. Halogen bulbs may also have 2 to 3 times the life of ordinary light bulbs.

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.

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.