
The E27 lamp has been a staple in lighting for decades. Also known as the 'thick' or 'large' screw base, it derives its name from the screw thread diameter of 27 millimeters. You can find this light source in virtually any room, from living rooms and bedrooms to offices and stores. Traditionally known from the incandescent bulb, the E27 base is now the standard for modern LED lighting, bringing significant advantages.
Traditional incandescent and halogen bulbs with an E27 base consume a lot of energy and have a limited lifespan. Switching to LED E27 lamps offers several practical benefits:
[Image: Comparison of traditional incandescent E27 bulb vs. LED E27 lamp in terms of energy consumption and lifespan. Show the bulbs and a graphical representation of wattage and burn hours.]
When replacing a traditional E27 bulb with an LED variant, lumens are the determining factor for light output, not wattage. Use the table below to find a suitable LED replacement.
Traditional E27 Wattage | LED E27 Lumens (approx.) |
---|---|
15W | 130-150 lm |
25W | 200-250 lm |
40W | 400-470 lm |
60W | 800-850 lm |
E27 lamps come in a wide variety of shapes and with specific functionalities. This makes it possible to find a suitable E27 light source for every fixture and desired atmosphere.
The shape of the E27 lamp influences light distribution and aesthetics in your fixture. Common shapes include:
[Image: Overview of different E27 lamp shapes (pear, globe, candle, ball, spot) with labels.]
When choosing an E27 lamp, it's important to consider the following technical characteristics in addition to the fitting:
Specification | Explanation |
---|---|
Light Color (Kelvin) | The color temperature, expressed in Kelvin (K), determines the ambience of the light. From extra warm white (2200K-2700K) for intimate settings, to warm white (3000K) for general use, and cool white (4000K) or daylight white (6500K) for functional spaces. |
Light Output (Lumens) | This indicates the brightness of the lamp. The higher the lumen value, the more light the lamp produces. Compare this with the wattage of your old lamp to find a suitable replacement (see the 'replaces (Watt)' indication). |
Color Rendering Index (CRI) | The CRI value (Ra) indicates how faithfully colors are rendered under the light of the lamp. A high CRI (80+ or 90+) is desirable in spaces where color accuracy is important. |
Dimmable | Not all E27 LED lamps are dimmable. If you want to adjust the light intensity, choose a dimmable variant and check compatibility with your dimmer. There are also 'Dim-to-Warm' lamps, which become warmer in color as they are dimmed. |
Beam Angle (degrees) | The beam angle is especially important for E27 spots. A narrow angle provides accent lighting, while a wide angle offers general lighting. |
Smart Functions | Some E27 LED lamps can be controlled via an app, remote control, or voice assistant, and offer features such as RGB color change or schedules. |
When selecting the right E27 lamp for your situation, consider the following steps:
If you have specific questions about installation or compatibility of E27 lamps with your existing fixtures, we recommend contacting an electrician. Many installers appreciate the versatility of E27 LED lamps due to their easy replaceability and energy-saving properties.
This table provides an overview of common incandescent wattages and the equivalent LED E27 lamps in terms of light output.
Old Incandescent (Watt) | LED E27 Lamp (Watt) | Indicative Lumens |
---|---|---|
25W | 2-3W | ~250 Lumens |
40W | 4-5W | ~470 Lumens |
60W | 7-8W | ~800 Lumens |
75W | 9-10W | ~1050 Lumens |
100W | 12-13W | ~1520 Lumens |
[Reference: Link to a blog post or article about Lumens vs. Wattage to further clarify the relationship between light output and energy consumption.]