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Every once in a while, you will get a dud, but for the most part they are intended to last for up to 10,000 hours. For comparable Lumens, they save about 75% of the energy that a regular filament based incandescent (the regular kind) will use.
Even with the duds, it saves you significant amounts of energy. Get a good bulb, though. You're going to want to like the light quality and a good bulb will last longer. You will save money even if they're giving away the incandescents.
Ideal conditions for a compact fluorescent bulb (CFL) are when the bulb comes on, has a chance to warm up, and then stays on. Closet lights will burn out sooner (per hour of use, but since they're used so less frequently), but you will still save energy.
Modern bulbs come on instantly, but they take about 30 seconds to heat up.
Best of luck!
What else can I help you with?
Why do you need to have the glass on the outside of a light bulb?
The glass envelope, or bulb, of an incandescent light bulb is needed to hold the inert gas, such as argon, that fills the space. The filament of a light bulb is made of tungsten wire. When electricity passes through it the filament becomes extremely hot and emits light. The inert gas surrounding the filament protects it from evaporating too quickly. A light bulb only lasts as long as its filament lasts.
Why does a light bulb filament act as resistor?
The filament of a light bulb isn't like a resistor ... it is a resistor. The only difference from the ones on circuit boards is the it's designed to operate at a much higher temperature. So hot that it glows. The glass envelope is there to prevent oxygen from getting in and promptly burning it. When the filament becomes too hot it breaks breaking the current that was lighting it in the first place. That is why the light bulb "burns" out.
What is inside of a light bulb and how does it work?
In an incandescent light bulb, a positive and negative (or neutral wire) are connected by a tungsten filament in a vacuum. An electrical current passes through the thin filament, heating it very hot and causing it to glow. Eventually, after repeated use, the tungsten filament gets quite thin and eventually breaks, which is what happens when the light bulb burns out! Also, if the filament is exposed to oxygen while the current is flowing, the filament will break melts.TIP: DON'T USE INCANDESCENT LIGHT BULBS... SWITCH TO ENERGY-SAVING COMPACT FLUORESCENTS!!!!Actually most incandescent light bulbs have argon and nitrogen inside them. Early lightbulbs were vacuums.
What happens to the bulb when the switch is on. why?
Current begins to flow through the tungsten filament of the wire. Because of its high resistance, the wire heats up till the point that it starts glowing, producing light from the bulb.
How long did the first light bulb stay lit?
The "The Centennial Light" 4 watt light bulb which was first lit in 1901 and is still in use today at a fire station in Livermore, California.
Who invented the long lasting filament electric light bulb?
Thomas Edison is credited with inventing the long-lasting filament electric light bulb in 1879. He developed a carbonized bamboo filament that could last for up to 1200 hours, making light bulbs practical for everyday use.
How long does a incandescent light bulb last?
It depends on the quality of filament, how often it is switched on and off and fluctuations of supply voltage.
When did Lewis Latimer improve the light bulb?
Lewis Latimer improved the light bulb in 1881 by inventing a more durable carbon filament that allowed the light bulb to last longer. His improvements made the light bulb more practical and accessible for everyday use.
What was the filament in thomas edisons light bulb?
The filament in Thomas Edison's light bulb was made of carbonized bamboo. Edison experimented with various materials before settling on carbonized bamboo as a durable and long-lasting option for the filament.
Why do you need to have the glass on the outside of a light bulb?
The glass envelope, or bulb, of an incandescent light bulb is needed to hold the inert gas, such as argon, that fills the space. The filament of a light bulb is made of tungsten wire. When electricity passes through it the filament becomes extremely hot and emits light. The inert gas surrounding the filament protects it from evaporating too quickly. A light bulb only lasts as long as its filament lasts.
Why not iron filament used in bulbs?
Iron filaments are not used in light bulbs because they have a relatively high melting point and poor conductivity compared to tungsten, the metal commonly used in filament bulbs. Iron would not produce as much light or last as long as tungsten in a filament bulb.
Thomas Edisons theory for enventing the light bulb?
Thomas Edison did not invent the light bulb but improved upon existing designs. He developed a carbon filament that could last longer and produce a steady light, leading to the invention of a practical and commercially viable incandescent light bulb. Edison's method involved creating a high vacuum inside the bulb to reduce the rate of oxidation of the filament, allowing it to glow for long periods.
What was thomas edisons main problem in inventing the light bulb and how did he solve this problem?
Edison's main problem was finding a long-lasting, practical filament material for the light bulb. He experimented with various materials before discovering that carbonized bamboo filament could last for up to 1200 hours. This solution greatly improved the practicality and success of the light bulb.
Does the watage of a light bulb affect how long it lasts?
No, the type of bulb and filament will determine life, as well as how many times it is turned off and on. Repetitive on and off cycles will reduce the life of the filament.
What was Thomas Edison's main problem with inventing the light bulb?
The main problem with Thomas Edison inventing the light bulb is that he did not have enough filament, so he used a different material to replace it.
How long does a mood light last?
The mood light will last as long as the bulbs life, which has a lifetime of an average household light bulb. once the bulb burns out, one must replace the bulb with another mood light bulb.
How long did the last light bulb last?
1400 hours
