For comparable lumens you pay less for energy efficient bulbs. For example, a typical 75 watt incandescent bulb provides about 850 lumens. The same light from an LED bulb would only consume about 12 watts. So even though the LED costs more to buy, it costs only about 16% of the cost of a comparable incandescent to operate.
the CFL is nowadays because because the input of CFL is less as compare together lamp while giving higher output of light
A standard filament lamp uses a tungsten filament to produce a light output. Low energy lamps use either a spiral fluorescent tube or LEDs to produce a light output.
Because banter lols.
They are not efficient compared to LED.
The motion of the electrons in the filament creates HEAT. The heat will excite the atoms of the filament until they emit Photons due to the jumping of electrons to higher energy shells.
Either the filament or a gas inside is heated. Once it gets hot enough, it dissipates some of the energy as heat and light.
A light bulb converts energy from one form to another: from electrical energy to thermal energy in the form of light and heat. Most light bulbs which have an incandescent filament convert electricity into some light energy plus a lot more heat energy, whilst the type of light bulbs which use fluorescent tubes create much less heat and thus require much less electrical energy to run. Typically, to produce the same amount of light energy, compact fluorescent light bulbs require only 20% of the electrical power drawn by incandescents.
Not without being converted into electrical energy.
In typical light bulbs, or incandescent bulbs, the resistance to the current directed through the filament causes the filament to heat up, thus radiating light. The glass bulb around the filament is vacuum sealed to remove oxygen, which would rapidly oxidize and destroy the super heated, ultra thin filament. there are variations of this technology in which the bulb is not a vacuum, but is instead filled with different gasses surrounding the filament, which allows the filament to burn even hotter, creating more light. fluorescent bulbs work by creating a reaction between mercury vapor and phosphors. electric current excites the mercury atoms, which then release ultraviolet light. The ultraviolet light causes the phosphors to fluoresce, which creates light in our visible spectrum.
Yes
Yes, on an attritional basis, as the old ones burn out-
Energy saving bulbs (typically LEDs) provide higher lumens per watt compared to filament lamps.
Filament of light bulbs are made up of Tungsten.
The motion of the electrons in the filament creates HEAT. The heat will excite the atoms of the filament until they emit Photons due to the jumping of electrons to higher energy shells.
Energy, in the form of electricity, causes the filament to heat up and give off light. Any energy which the filament loses by heating the bulb does not create light, and so is wasted. Thermal isolation minimizes the heat loss of the filament, and therefore reduces wasted energy.
yes, incandescent bulbs do not contain a filament of platinum. Yes they do contain a filament called a tungsten.
The filament breaks.
LEDs produce visible light and not heat. Filament bulbs use much of their energy to produce heat. The LED bulb produces more light per watt consumed.
In incandescent bulbs, gases (other than oxygen) prolong the life of the filament. In florescent bulbs, the gas takes the place of the filament.
No, not in the filament. You are probably thinking of compact fluorescent light bulbs, which do contain mercury.
tungsten