In brief: The ideal replacement for old incandescent bulbs depends greatly on how you intend to use it. In our 2026 test & comparison, we show that modern LED bulbs impress with their efficiency, light quality and lifespan. The key factors are the right brightness in lumens, the colour temperature in Kelvin and the correct fitting. While filament LEDs create a warm ambience, specialist reflector bulbs are essential for directional light and grow lights are indispensable for caring for houseplants.
2026 brings no technical revolutions in the field of light bulbs, but it does offer a wide range of mature and specialised LEDs for every need. The era of the simple incandescent bulb is finally over. Today, you no longer ask yourself "How many watts?", but rather "What kind of light do I really need?". Our comprehensive test & comparison guides you through the most important criteria and helps you find the perfect light bulb for your lamps and rooms.
Which types of light bulbs are included in the test?
LED bulbs clearly dominate the field of lighting. They are energy-efficient, long-lasting and available in countless shapes. The most important types for the home are standard LEDs in bulb or candle shapes, filament LEDs with visible "filaments", reflector bulbs such as PAR or R80 for directional light, and specialist grow lights.
Each type has its strengths. Standard LEDs are the all-rounders for ceiling and table lamps. Filament LEDs score points with their nostalgic design. Reflector bulbs create accents and illuminate pictures or display cabinets. Specialist lights such as the
provide targeted support for plant growth.
The standard: E27 and E14 LED bulbs
The E27 (large) and E14 (small) fittings are by far the most common. This is where you will find the greatest selection. Pay attention to the overall dimensions, especially with enclosed lampshades. A product such as the
with its compact teardrop shape also fits into narrow lamps.
Special features: reflector and filament bulbs
Reflector bulbs direct the light in a focused beam. They are perfect for spot lighting. Filament bulbs such as the
on the other hand emit their light almost evenly in all directions and are therefore the first choice for open pendant or chandelier lights.
Tip: Combine different types of light bulbs in one room. For example, use the general, soft light from filament LEDs for overall illumination and create targeted accents on pictures or decorations with narrow-beam reflector bulbs.
What makes a good light bulb?
The quality of a light bulb is defined by several technical values that you should always compare. The most important are luminous flux in lumens (lm), colour temperature in Kelvin (K) and colour rendering (CRI or Ra).
Understanding brightness: lumens are the new watts
Forget wattage as a measure of brightness. Lumens are what matter. An old 60-Watt incandescent bulb produced around 700 lumens. Today, look for an LED with similar brightness. The higher the lumen rating, the brighter the light bulb.
Light colour and atmosphere: the Kelvin scale
Colour temperature determines whether the light appears warm or cool. Low values around 2700K (warm white) create a cosy atmosphere. Values around 4000K (neutral white) appear functional and encourage concentration. Above 5000K (daylight white), the light is very bright and stimulating, similar to midday light.
Light quality: the CRI index
The Colour Rendering Index (CRI) indicates how naturally colours appear under the bulb. A CRI of 80 is good, while 90+ is very good and close to natural sunlight. A high CRI is particularly important in work areas or in front of a mirror.
Warning: Cheap light bulbs often cut corners on the electronics in the base. This can lead to flickering, early failure or even interference with your home's electrical system. It is better to invest in branded quality – the higher purchase price pays for itself through longevity and stability.
Which light bulbs are suitable for which purposes?
Choosing the right light bulb depends greatly on where you plan to use it. A home office has different requirements from a living room, and a display cabinet has different needs from a hanging plant.
Living room and bedroom: create a cosy atmosphere
Warm white bulbs from 2700K to 3000K are the first choice here. Dimmable filament LEDs or standard LEDs in a large bulb shape provide flexible lighting. They create an inviting and relaxing atmosphere.
Workspace and kitchen: support concentration
In areas where you work or cook with concentration, neutral white bulbs (3300K-5000K) with high brightness (at least 800 lumens) and a CRI >90 are ideal. They reduce eye strain and ensure realistic colour rendering.
Plant lighting: the right light for greenery
Standard light bulbs do not cover the full spectrum that plants need for photosynthesis. Specialist grow lights such as the emit light in the blue and red wavelength ranges. This promotes healthy growth even in dark locations.
The right lighting makes the difference between a plant that merely survives and one that thrives. Specialist LEDs are indispensable here.
How do I find the right light bulb for my lamp?
Before buying a new light bulb, check three essential things on your existing light fitting: the base, the maximum permitted wattage and the available space.
Step 1: Identify the base
The most common base is E27. Small candle bulbs often use E14. Unscrew the old bulb and check the fitting. Make a note of the designation.
Step 2: Check the space available
Not every light bulb fits every lamp. The dimensions (length and diameter) are particularly important for lamps with a closed or narrow shade. Measure the available space with the lamp switched off.
Step 3: Dimmability and special features
Would you like to adjust the brightness with a dimmer? Then you need light bulbs explicitly marked as "dimmable". Also note that not all dimmable LEDs are compatible with every type of dimmer.
Note: The "max. 60W" specification on your lamp refers to the heat generated by incandescent bulbs. You can safely use an LED with a higher lumen output but lower wattage, e.g. a 12W LED that is brighter than a 60W incandescent bulb.
Light bulbs compared directly in 2026
To make your decision easier, we have compared selected light bulbs for you. The following table shows the most important features side by side and helps you see the differences at a glance.
The highest-rated light bulbs in our range compared directly:
| Model | Customer rating | Availability |
|---|---|---|
| 36W Plant Grow Light LED Bulb E27 🏆 Test winner | ★ 5,0 (21) | In stock |
| 11W E27 WW R80 1055 LM LED Reflector | – | Currently unavailable |
| 2x Anouk XL Pendant Lamp with Grid 93680/70 Concrete 48cm incl. 2x Warm Bulbs | – | Currently unavailable |
| 2x Industrial Pendant Light Anouk 93678/70 Concrete 40cm incl. 2x Warm Bulbs | – | Currently unavailable |
| 3 Watt LED Bulb - E27, Teardrop Shape, Warm White, 245lm, 2700K, 45 x 74 mm | – | Currently unavailable |
This overview provides an initial guide. Always consider your individual requirements in terms of brightness, light colour and intended use.
Our final buying advice
Choosing the right light bulb is a combination of technology and personal preference. Start with the key facts: base, lumens and available space. Then consider the desired effect: should the light feel cosy, functional or energising?
Choose branded quality from a specialist retailer. You benefit from better colour rendering, a longer service life and guaranteed switching cycles. A good light bulb will serve you well for many years.
Think about the environment: the high efficiency of LEDs directly reduces electricity consumption and therefore CO2 emissions. Dispose of old light bulbs properly at your local recycling centre. This helps close the loop responsibly.
Armed with this knowledge, you are sure to find the perfect light bulb for your needs in our wide range of technology and lighting products. Good lighting makes all the difference.
Frequently Asked Questions
- Which is more important when buying a light bulb: watts or lumens?
- lumens are the key value. Watts only indicate power consumption. Lumens measure the actual brightness of the light output. Always compare the lumen ratings to achieve the desired brightness. Modern LEDs produce a high lumen output with just a few watts.
- Which colour temperature is suitable for each room?
- Warm white (2700K-3000K) creates a cosy atmosphere and is ideal for living rooms and bedrooms. Neutral white (3300K-5000K) has a functional, concentration-enhancing effect, making it perfect for kitchens or home offices. Daylight white (from 5000K) is very bright and cool, making it well suited to workshops or garages.
- Can I use LED bulbs in old lamps?
- Yes, in most cases this is possible without any problems. Make sure the base is identical, for example E27 or E14. Check whether the LED bulb is dimmable if you want to use a dimmer function. In enclosed fittings, the bulb should not get too hot.
- How long do high-quality LED bulbs last?
- High-quality LEDs easily achieve a service life of 15.000 to 25.000 operating hours. With average use, this corresponds to a lifespan of 15 years or more. The service life specification (L70) indicates how many hours it takes for the light output to fall to 70% of its initial value.
- What are the advantages of filament LEDs?
- Filament LEDs imitate the appearance of classic filaments and provide particularly warm, all-round light. They are the ideal choice for open lamps and pendant lights where the bulb is visible and a decorative look is desired without sacrificing LED efficiency.