The energy saving light bulbs use less energy than traditional bulbs to produce the same amount of light. They can be immediate or non-immediate light. They also have a longer duration of up to 15 years. The bulbs are available in various color temperatures from cool tones and bright daylight white ones and warmer, are an easy way to save energy and lower your bills current.
Watts and Lumens
The watts indicate the amount of energy that consumes a bulb to produce light, while the lumen is the unit used to measure the luminous flux of a light bulb. LED bulbs, energy efficient require less energy to emit the same amount of light as a traditional bulb.
It is common belief that the power in watts (W) of a light bulb indicates the amount of light emitted. The power is the amount of energy consumed by the bulb. The luminous flux of a light bulb, however, is calculated in lumens (lm).
Some bulbs, for example, such as LED, emitting the same luminous flux (in lumens) of a light bulb classical, but with a reduced power consumption.
Therefore, to know the luminous flux of a light bulb, think lumens, not watts. If the value lumen is higher,higher is the luminous flux.
Color of Light
The color temperature is given in units called Kelvin; This value determines if the bulbs produce a warm or cold light. LED and energy saving bulbs can have different color temperatures. The bulbs with lower Kelvin value emit a yellow light warmer, more comfortable, while those with higher value Kelvin produce a cold light, more energizing.
CRI (Color Rendering Index)
The sun is the most natural light we have and so is the standard yardstick for any other light source. The natural outdoor light has a color rendering index (CRI) of 100, and is often the standard of comparison for any other light source. Higher is the CRI (on a scale from 0 to 100), will appear more natural colors.
The new energy label is mandatory for light bulbs (incandescent lamps, fluorescent lamps, high intensity discharge and LED) and lighting equipment put on the market on 1 September 2013. They are excluded from the labeling certain types of lamps and LED modules with a luminous flux very low (less than 30 lumens) when shipped to batteries and those marketed for applications whose primary purpose is not enlightenment.
The label is divided into three areas:
- AREA 1: where the lamp is identified, bringing the name or trademark of the manufacturer and the model name.
- AREA 2: which shows the energy efficiency classes and highlights the class membership of the specific model of bulb. There is in fact shows the series of arrows of increasing length and different color, associated with a letter of the alphabet (from A ++ to E). The A ++ (and the green arrow shorter) indicates therefore, other things being equal, the lamps with the lowest consumption of energy, the letters C, D or E (with its longest arrows from yellow to red) indicate the products that have the highest consumption. This space can also be given the symbol Eco-label, the eco-label awarded by the European Union. A ++, A +, B for LED bulbs, saving light bulbs, fluorescent light bulbs. B, C for ECO halogen bulbs (new generation). D for conventional halogen bulbs. And for normal incandescent bulbs.
- AREA 3: where it is reported the energy consumption in kWh per 1000 hours of operation per year.