Design

Which bulbs to choose?

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Osram, Philips

Should we opt for compact fluorescent lamps, halogens, LEDs? Today, with the elimination of incandescent lamps, the choice of a simple bulb looks like an obstacle course.

Light production accounts for nearly 19% of global energy consumption. Therefore, we understand why the lighting is part of the areas regulated by the new regulation, which advocates a systematic use of natural light and inscribes the electric lighting in the calculation of the Cepmax (maximum consumption of primary energy, see lexicon 44). With the obligation to use light bulbs with low energy consumption. But besides the choice of this or that technology, we can also be puzzled by the multiplicity of models, shapes and styles.

Incandescent bulbs

It must be done: it is soon over. They had a major disadvantage: only 10% of the electricity they consumed was allocated to lighting, the rest evaporated in unnecessary calories. And their lifespan was limited (more by the will of the manufacturers who ensured a regular renewal of the market than for technical reasons).

Halogen lamps

They have improved over time and have lower power consumption than before. They are also often called "halogen eco". Advantages: they offer a pleasant light, consume 30% less energy, and have a relatively low cost for a lifetime of 2 to 3 years. It's still a good compromise, but they are destined to disappear, too. Made of glass and metal, they are treated like household waste and do not require specific recycling. Disadvantage: they heat up and "slam" quite easily.

Where to use them?

Wherever you have incandescent lamps ... as long as you find them!

Compact Fluorescent Lamps (CFLs)

They are fluorescent tubes (formerly improperly called neon tubes) miniaturized, folded in two, three or four, or rolled up, and have a base containing an electronic ballast. They have several advantages over the conventional incandescent lamp: an efficiency of 60 to 70 lumens per watt against 14 to 25 lumens per watt for the incandescent lamp, a service life of 6 to 15 times longer and reduced heating. But also a number of disadvantages: these lamps pollute the environment in case of uncontrolled release or breakage because of the mercury they contain, and they are fragile. The rise in light is often slow after switching on. They are not suitable for outdoor use, especially below 0 ° C. The frequent switching on and switching off of the lamp considerably reduces its life. And for most bulbs, the use of a power dimmer is impossible. "Dimmable" models allow step lighting.

Where to use them?

Where they will stay on for more than an hour a day without interruption. Avoid rooms where you just pass: corridors, toilets ...

LED lamps

The lights of the future, according to specialists. They are changing our relationship to lighting. They offer up to 85% energy savings, last 5 times longer than compact fluorescents, light up instantly and do not contain harmful materials such as mercury. Another advantage, the user has the opportunity to customize its lighting with a white light, bright or warm, and especially to vary the light intensity.

According to Climate Group (an organization whose goal is to help governments and businesses to adopt the path of low carbon), the implementation of LED lighting would make it possible reduce energy consumption by 40% and save 130 billion euros. That means 670 million tonnes less CO2 in the atmosphere every year, the equivalent of the level of CO2 emitted by all air flights in the world in 2011. Disadvantages of size: for the moment, we hardly find LEDs illuminating at over 60 W and they are still expensive.

Where to use them?

Everywhere, as long as their power is sufficient. Domestic lighting with LEDs is improving day by day, and more and more fixtures are designed for this technology. Experiments have been conducted to fully equip apartments with this type of light source. Without being perfect, the results are very satisfying. Regarding the use of a LED bulb on an old luminaire, take advice from a professional before making your choice.

The lumens

measure the amount of light emitted. As recalled by the AFE (French Association of Lighting), it is now better to "think in lumens and forget the watts". To select a new lamp, look for this indication on the packaging instead. for example, a 40W incandescent light bulb corresponded to about 400 lumens.

The color temperature is expressed in kelvin (whose symbol is K):

2,700 K is a warm light ranging from orange to yellow

4000K equals the lightly pink daylight

6000/6 400 K gives a white light pulling on the blue

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