LED bulbs have been known to everyone for some time – energy efficient, environmentally friendly and versatile. You still need a bit of technical Chinese to be able to choose the right light body. With such a vast selection of lamp types, it is nowadays important to be clear about what the terms energy efficiency class, lumen and color temperature and E27 socket stand for. In the next lines, we will deal with this topic and clarify especially for you some of the most important aspects in terms of LED bulbs. What are the advantages of LED bulbs and why should you replace conventional bulbs or fluorescent bulbs with them?
Energy consumption and energy efficiency of LEDs
In a nutshell, a lamp should be more efficient to consume less power. In fact, LEDs consume only about 18% of the energy needed for a traditional light bulb with the same light output. In other words: with the switch to LED bulbs you can save more than 80% on electricity costs! And so it is already clear that LED is the most efficient light source at the moment, together with the energy saving lamp and the compact fluorescent lamps. Less energy consumption automatically means less waste and less pollution and so you are also happy about more light with a clear conscience.
It is no coincidence that all lamps have been labeled with the European Union (EU) energy label on the packaging since 2014. One speaks here, as with all other electrical appliances of energy efficiency classes. These are known to be from A ++, what for very efficient is up to the worst efficiency class E, which is practically no longer used. On Energy efficiency calculator for light bulbs Immediately gives you the exact efficiency class of a light source. All you need is a few simple details such as wattage, lumen output, and lamp type.
Does this sound a bit too complicated? But it is not. Just read on and find out more.
Watt was yesterday, Lumen is more important now!
Previously, we only considered the watt count if we wanted to estimate the brightness of a light bulb when making a purchase. The more Watts, the brighter the bulb. Since the LEDs entered the light scene, the value of watts has lost some importance. Because only then we can no longer estimate the light output of a light source. Lumen is now the value that gives us exact information about the brightness. That’s why the number of lumens has always been on the packaging of a light source next to the efficiency class.
How should one actually understand the term lumen? Very easily. Lumen (lm) is the standardized unit for the so-called luminous flux or in other words: for the amount of light that emits a light source to all sides – the light output of a lamp. Similar to the Watt it says here – the higher the value, the more efficient the lamp.
A closer look at the conversion of watts into lumens gives you the following:
- 40 watts = 430 lumens
- 60 watts = 730 lumens
- 100 watts = 1380 lumens
For comparison: a candle = about 12 lm
And a simple tip for converting: watts x 10 = lumens (approximately).
This is because you can roughly estimate which LED bulbs you should buy as a replacement for the old light bulb if you value the same light output of the bulb. This formula is especially true for the LED lights in bulb shape.
And what does then light output mean? Simply explained: this term tells you how much of the energy consumed is converted into light. Not for nothing is the unit of measure here lumens per watt (lm / W). So, the higher the value, the more efficient / efficient a light bulb.
About sockets and sockets
Even as a layman, you already know what the socket and base of a light bulb / lamp is. But do you also know exactly what the E27 version is called and where is the difference to E14? The answer is much easier again than expected.
The standard sockets and sockets have not changed with LEDs and all other new lamp types. Just as in the past, E27 and E14 are some of the most common versions of bulbs. In addition, sockets such as GU10 for 230 volts, GU5.3 for 12 volts and GU4 are often used.
The E27 socket has a typical screw thread, which is often called”filament thread”. The number 27 comes from the fact that the outer diameter of the socket exactly corresponds to 27 mm. E27 bulbs are available in numerous variants on the market, from LEDs to energy-saving lamps to compact fluorescent lamps. In addition, a different types are available, as based on the E27 LED examples from Gluehbirne.de you can see. You can choose between the classic pear shape, spotlight, candle, Globe or Edison shape. Usually this version is used in suspended or larger table lamps.
E27 called or”candle holder”. The smaller version is mainly used in desk lamps, refrigerators and chandeliers, but also in sewing machines or extractor hoods.
Color temperature is still light color
When choosing the right LED bulbs, this term plays a crucial role. Because the light color has a direct effect on our well-being and performance, as it affects our sleep-wake rhythm, much as the sun does. Warm light has a higher proportion of red light while cold light has a higher proportion of blue light. While the first favors the release of melanin in our brains, it slows down the second, leaving you awake and focused for longer.
You will find LEDs in the three color temperatures / light colors – warm white, neutral white and daylight white. Light color is measured in Kelvin. So is warm white light from 2 700 Kelvin and fits best where you should really relax – in the living room and bedroom. Neutral white, on the other hand, starts at 3 300 Kelvin and is more likely to be recommended in the kitchen or in the study. Daylight then starts at 5 300 Kelvin and is especially used where it is best to concentrate, i. E. at the desk or in the workshop for example.
Extra tip: Very important for the actual light quality of LEDs is the so-called color rendering index (CRI or Ra value). This is best to be greater than 90.
So, if you still have not changed your traditional light bulbs at home or the fluorescent lights in the office, it may already be time to do so. Think about the brightness and color temperature you want in each room and find the appropriate value in lumens using comparison charts. Then select the appropriate socket type / socket and lamp shape and order the desired LED bulbs at a well-established manufacturer or dealer on site or online!