Halogen lamps are mainly used in indirect light, for office or living room lamps and also for outdoor lighting.
The bulb is halogen part of present different types of bulbs in the lighting market with:
incandescent bulb, LED bulb, Neon, light bulb low consumption.
Principle: two types of halogen bulb
Just like the incandescent lamp, halogen bulb has a tungsten filament but protected by halogenated gases (iodine and bromine) which limit its sublimation.
In a halogen lamp, the molecules of gas suspension allow particles that come off the filament with the heat to come to pick up there then. However, this cannot be done at high power. Therefore, to make the filament ageing well, that the lamp is used at its maximum intensity.
There are two types of halogen bulbs, running:
on the 230 V mains:
Classic shape bulb (Cap screw or bayonet),
bulb tube (nerve R7s),
or G9 or GU10 base.
the voltage of 12 V, called TBT (very low voltage), then powered by a transformer:
use 12 V power allows to increase its operating temperature and leads to even greater light intensity,
comes with a GU5.3 base.
Halogen lamps are often fitted with a dichroic reflector which has the effect of projecting light forward and heat to the rear.
Good to know: A new technology for the halogen is emerging. According to the manufacturers, it would generate a 30% energy saving (the filament of the bulb would be warmed by the heat produced).
Halogen: very good resistance
Halogen technology gives a better resistance and therefore a better brightness:
the bulb is quartz glass support high temperatures,
with the regeneration of the filament, its lifetime is longer than that of conventional bulbs (up to 4 times).
the light produced by a halogen lamp has a good color rendering index, the light is close to the natural light (Sun). The human eye perceives colors, truer way
safety very low voltage operation that allows to book courses more than fancy for the preformance, or more design expectations.
Disadvantages of halogen: a high price
These are indicative prices of halogen:
Halogen tube high voltage 300 W, 117 mm: €2.
Halogen 230 V, nerve G9: €12.
Halogen 12V, GU5.3 Base: €10.
Other disadvantages of halogen:
Halogen gases are pollutants and toxic,
the luminous flux is strong and dazzling and reduce intensity limits the duration of life,
their performance is better than that of incandescent lamps but at prices equivalent, a far cry from that of fluorescent lamps.
In the end, these lamps are little economic and not environmental.