LED or LED Bulb

What Is The Function Of An LED Lamp?

The LED ( Light-Emitting Diode) or light -emitting diode (LED) is an optoelectronic component that emits monochromatic light when it is covered by an electric current. The first LED created in 1962 was of red color used in particular as a light on electronic devices. It was only in the 1990s that the blue LEDs appeared. The addition of a thin film of yellow phosphor makes it possible to obtain white LEDs which is a real technological breakthrough and can now be used in applications such as lighting. These white LEDs can have different color temperatures from very warm white (2700 ° kelvin) through a neutral white (4000 ° kelvin) to a cold white (6500 ° kelvin). The color rendering index (IRC) ranges from 80 to 90, with a luminous efficiency of up to 130 lumens per watt, constantly increasing in flux. By adding a lens, it is thus possible to control the angle of opening which, as a rule, on the so-called “retrofit” lamps (which is of the same size as the source of origin) have an angle of 25 ° and 40 °.

What Is The Lifetime Of An LED Lamp?

The average lifetime of an LED bulb is 20,000 to 25,000 hours.

Contrary to what one might think the LEDs heat up at the back of the diode and a bad control of the heat dissipation can cause the flux of the source to drop, see its destruction. An LED will have a more efficient light output at an ambient temperature of 0 °, whereas at a room temperature of 35 ° there will be a slight loss of flux.

How To Choose An LED Lamp?

Take for example the replacement of a bulb with a reflector of 50w 230v in base GU10 defined on educationvv.com: the equivalent to date and a lamp between 10 or 7,5w depending on the latest technology used. Light bulbs or lamps from major manufacturers such as Sylvania, Philips, Osram or General Electric should also be selected in order to be sure of their quality and lifetime.The luminous flux indicated on the package expressed in lumen must be about 350 to 450 lumens. Spread out versions with a multitude of small LEDs, this is not a guarantee of quality and it is a technology now obsolete. Some lamps or LED bulbs can be mounted on dimmer but this must be clearly stated on the packaging. Avoid reflector bulbs with angles of opening greater than 40 ° because beyond that there is little left of luminous flux. Be sure to check the color temperatures that are usually 3000 ° K (warm white and equivalent to a halogen bulb) or 4000 ° K (neutral white). Some manufacturers propose temperatures of 6500 ° K in daylight but these give a very cold and aseptised light which is not necessarily suitable for private uses such as for living rooms, bedroom or living room. However, the choice of the color temperature remains a personal choice depending on the taste of each person and the lighting environment that one wishes to create. To simplify the choice of your lamp or light bulb with respect to its power in watt it is enough to multiply it by 5. It is not quite exact but it allows you to see at a glance the equivalence by Compared to its incandescent or halogen version .

Last point: LED lamps or bulbs do not mix well with glass wool or any materials of this type, so it will be necessary to separate it or to use a luminaire adapted to these conditions.

Gallery

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