| Watt incandescent lamp | Luminous flux incandescent lamp | Watt LED | Luminous flux LED |
|---|---|---|---|
| 25 watts | 200 lumens | Approx. 2 to 4 watts | Approx. 250 lumens |
| 40 watts | 430 lumens | Approx. 4 to 6 watts | Approx. 500 lumens |
| 60 watts | 730 lumens | Approx. 8 to 10 watts | Approx. 800 lumens |
| 75 watts | 900 lumens | Approx. 9 to 11 watts | Approx. 1.000 lumens |
| 100 watts | 1.380 lumens | Approx. 13 to 15 watts | Approx. 1.500 lumens |
| 150 watts | 2.150 lumens | Approx. 20 watts | Approx. 2.500 lumens |
Illuminants
Illuminants – the basis for good light
Modern LEDs and other illuminants for first-class light quality and efficient lighting
Discover all illuminants >
LEDs and incandescent lamps in comparison: How many lumens correspond to how many watts?
Which light sources are available?
LED illuminants
LED lamps are characterized by their very high luminous efficacy and extremely long service life of often up to 20,000 hours. High-quality premium products shine even sometimes up to 50,000 hours. The light sources are unrivaled in terms of energy efficiency and can often be dimmed. With some products, you can adjust the light color, and some are also smart controllable.
Filament LEDs
Filament LEDs are visually modeled on incandescent lamps. For this purpose, the retrofit bulbs have LED filaments in the bulb, which are reminiscent of the filament of the incandescent lamp. So with LED filaments, you get light bulbs that feature modern, efficient technology and at the same time exude charming vintage flair with their traditional light bulb design.
Smart Home
Smart illuminants are particularly impressive with their convenient control: using a remote control, smartphone, tablet or even voice command, you can conveniently switch the light source on and off. With many smart home illuminants, you can also dim the light, adjust its light color or color. These innovative products are ideal for getting started with smart lighting.
Incandescent bulbs and lamps
The tried-and-tested incandescent bulbs are particularly pleasing with their cozy warm white light, which can be dimmed. In addition, incandescent bulbs score with their brilliant color rendering, so that colors of illuminated surfaces or objects are reproduced very naturally. On the other hand, the energy consumption of incandescent lamps is quite high and their service life is short compared to other light sources.
Halogen incandescent lamps
Like incandescent bulbs, halogen bulbs delight with their brilliant, lifelike color rendering and cozy warm light. Unlike them, however, they consume less power while lasting longer. High-voltage halogen lamps last about twice as long as incandescent lamps, low-voltage halogen lamps even longer. However, they cannot compete with LEDs.
Fluorescent tubes and lamps
Fluorescent tubes usually have a rod or ring shape and require a ballast to operate. They are great for large-area, even lighting in a room. Fluorescent lamps, which contain small amounts of mercury, are more energy-efficient and longer-lasting than halogen lamps and incandescent lamps. However, they do not come close to LEDs in this regard.
Frequently asked questions for our lighting experts
Our store manager is happy to answer frequently asked questions about light bulbs.
Anja Schuh
What do E14 and E27 mean for illuminants?
E14 and E27 are important indications of the socket of the lamp and the base of the illuminant. The E stands for the famous inventor Edison, who received a patent for the incandescent lamp in 1880. The numbers 14 and 27 refer to the diameter of the lamp base. Thus, the thread of a bulb with an E14 base has a diameter of 14 mm, while the thread of E27 bulbs measures 27 mm in diameter.
Which light sources are particularly economical?
Economical illuminants and LEDs can be used synonymously, so to speak. Because in terms of energy efficiency, illuminants with LED technology are the clear favorites.
Don't be put off by the new energy label. With the adopted EU regulation, the requirements for frugality are increasing, which means that products automatically fall into lower classes. This does not mean that LED lamps are suddenly less energy efficient. Rather, the aim is to encourage manufacturers to develop even more economical products.
Which illuminants do not get hot?
All light sources generate heat. Unlike incandescent or halogen lamps, however, LEDs do not get hot because their heat production is much lower. This is due to the built-in heat sink that dissipates the heat generated by the LED.
How warm an LED illuminant gets depends on various factors, in particular the light output and efficiency as well as the size and installation location of the illuminant. For example, very brightly shining light sources with a high light output generally generate more heat than those with a lower light output. Energy efficiency also plays a role here: the higher it is, the better the ratio of light output to power loss. LED lamps with a high efficiency are therefore characterized by lower heat generation.
In addition, if the lamp body is very small, so that a heat sink barely fits inside, the LED lamp will generally be warmer. And: The better the LED can dissipate its heat into the environment, the less warm it becomes itself.
Which light sources are dimmable?
Incandescent and halogen lamps can basically be dimmed. For low-voltage halogen lamps, you should use a dimmer that matches the light source. Low-voltage halogen lamps with conventional transformers are compatible with a leading-edge phase dimmer, while low-voltage halogen lamps with electric transformers require a trailing-edge phase dimmer.
To find out whether an LED lamp is dimmable, simply refer to the information on the respective product page. Here you can also find out whether the light source can be dimmed continuously or in steps. When dimming LEDs, the technical interaction between the illuminant and the dimmer is very important. It is best to use a modern dimmer designed for LEDs.
Some LED light sources are equipped with dim-to-warm technology. This means that the light becomes darker and also warmer when dimmed. So not only does the brightness change, but also the color temperature – just like an incandescent lamp.
With some LED lamps, you can not only dim the light, but also change the color of the light. Thus, depending on your mood, the light shines in a cozy warm white or in an activating daylight white.
Which light sources do not dazzle?
Good glare control is the be-all and end-all for soothing lighting. Matt, opal and head-mirrored light sources that reduce glare are recommended. The same applies to smoke and
gold-coated light sources
.In general, we advise you to choose luminaires that do not allow a direct view into the illuminant. If you are very sensitive to glare, it is best to choose a luminaire with an indirect lighting effect. For example, uplights and wall/ceiling luminaires that direct their light towards the wall or ceiling.
What are the light sources of the future?
The future undoubtedly belongs to LEDs. Whether as built-in modules or as replaceable light sources, LED lamps consume little power, which reduces energy costs and environmental impact.
Which illuminant is suitable for which lamp?
If you want to choose a suitable illuminant for your lamp, there are a few things to consider. First of all, you should make sure that the bulb base is compatible with the luminaire socket. For example, for a luminaire with an E27 socket, buy a bulb with an E27 base.
The shape of the bulb should generally match the design of the luminaire. While in some cases it plays no or only a minor role, in others it is decisive for the lighting effect and appearance of the luminaire, especially if the illuminant is completely exposed.
Another criterion for a good light image is the coating of the illuminant. You should also match this to your design luminaire.
- For luminaires with opal diffusers, matt or opal light sources are recommended to reduce glare.
- Tinted or colored diffusers harmonize very well with clear or gold-coated illuminants.
- For design luminaires with opaque shades, the coating of the bulb does not matter.
- If you are using a luminaire without a shade where the illuminant is exposed, feel free to draw inspiration from our product images in the store when choosing a suitable illuminant.
Good to know: When you order a luminaire from us, we will automatically suggest suitable illuminants when you purchase it.
When will which illuminants be banned?
Due to the so-called incandescent lamp ban of 2009, some illuminants have already disappeared from the market. The aim was and still is to set higher criteria for energy efficiency, so that products that do not meet these requirements gradually disappear from the shelves. This initially affected lamps with unconcentrated light, which emit their light in all directions like incandescent lamps, and incandescent and halogen lamps with concentrated light, which emit at least 80 % of their luminous flux at an angle of 120°.
In addition, since September 1, 2021, compact fluorescent lamps, popularly known as energy-saving lamps, may no longer be placed on the market. The same applies to linear high-voltage halogen lamps with more than 2,700 lumens and low-voltage halogen lamps with reflectors.
On September 1, 2023, linear fluorescent T8 lamps, high-voltage halogen lamps (G9) and low-voltage halogen lamps (G4 and GY6.35) will be phased out.
Why do some lamps flicker?
If LED lamps flicker, it is often due to an incompatible dimmer with a high uptake load. Since this is significantly undercut by LEDs with their much lower power, an imbalance arises between the components. This is often noticeable by flickering of the light source. To avoid this, we advise you to use a high-quality dimmer when using LED lamps, which is designed for the low power of the energy-efficient illuminants.
How do I change the bulb?
Changing the bulb varies from model to model. Therefore, we recommend that you follow the instructions of the respective product and, in case of doubt, contact our customer service or the manufacturer. In any case, you should unscrew the fuse before changing the bulb and then check whether the bulb is still hot.
If the bulb has a classic screw base, such as an E27 bulb, unscrew the light source and screw in the new bulb firmly so that it sits securely and without wobbling in the socket.
If the bulb has a so-called bayonet base, as in the case of a GU10 product, you must first turn the base slightly before you can pull out the light source. Then insert the new bulb into the socket and lock it in place with a slight turn to the right.
If you want to change a rod lamp such as an R7s bulb, hold the lamp firmly and turn the bulb against the holder direction to one end of the socket. The spring will then give way and you can pull the bulb straight out and then insert a new one.
How do I dispose of illuminants correctly?
The correct way to dispose of your lamps depends on the product. Is it an incandescent or halogen lamp? Then you can dispose of the bulb in your household waste without any problems. Halogen lamps with built-in ballasts are an exception. They are considered electrical waste and must be disposed of as hazardous waste. This is also where energy-saving lamps and LED lamps belong.
You can hand in hazardous waste at materials yards or collection points. For example, you will find collection bins for LEDs and the like in many DIY stores and supermarkets as well as electronics retailers and drugstores.