
The E27 bulb has been a staple in lighting for decades. Also known as the 'large screw socket,' it gets its name from the 27-millimeter diameter of its threaded base. You’ll find this light source almost everywhere, from living rooms and bedrooms to offices and shops. Traditionally associated with incandescent bulbs, the E27 socket is now the standard for modern LED lighting, bringing significant advantages.
Traditional incandescent and halogen bulbs with an E27 socket consume a lot of energy and have a limited lifespan. Switching to LED E27 bulbs offers several practical benefits:
When replacing a traditional E27 bulb with an LED variant, it's the lumen output that determines the brightness, not the wattage. Use the table below to find a suitable LED replacement.
Traditional E27 Wattage | LED E27 Lumen (approx.) |
---|---|
15W | 130-150 lm |
25W | 200-250 lm |
40W | 400-470 lm |
60W | 800-850 lm |
E27 bulbs are available in a wide variety of shapes and with specific functions. This ensures that there is a suitable E27 light source for every fixture and desired atmosphere.
The shape of the E27 bulb affects the light distribution and the visual appeal in your fixture. Common shapes include:
Besides the socket, consider the following technical specifications when choosing an E27 bulb:
Specification | Explanation |
---|---|
Light Color (Kelvin) | The color temperature, expressed in Kelvin (K), determines the mood of the light. Ranging from extra warm white (2200K-2700K) for a cozy setting, to warm white (3000K) for general use, up to cool white (4000K) or daylight white (6500K) for functional spaces. |
Luminous Flux (Lumen) | This indicates the brightness of the bulb. The higher the lumen value, the more light the bulb produces. Compare this with the wattage of your old bulb to find a suitable replacement (see the 'replaces (Watt)' indication). |
Color Rendering Index (CRI) | The CRI value (Ra) shows how natural colors appear under the light of the bulb. A high CRI (80+ or 90+) is recommended in areas where color accuracy is important. |
Dimmable | Not all E27 LED bulbs are dimmable. If you want to adjust the brightness, specifically choose a dimmable variant and check compatibility with your dimmer. There are also 'Dim-to-Warm' bulbs, which become warmer in color as they are dimmed. |
Beam Angle (degrees) | This is especially important for E27 spotlights. A narrow beam angle produces accent lighting, while a wide angle is for general illumination. |
Smart Features | Some E27 LED bulbs can be controlled using an app, remote control, or voice assistant, offering features such as RGB color change or scheduling. |
When selecting the right E27 bulb for your needs, consider the following steps:
If you have specific questions about installing or compatibility of E27 bulbs with your existing fixtures, we recommend contacting an electrician. Many installers appreciate the versatility of E27 LED bulbs for their easy replaceability and energy-saving features.
This table provides an overview of common incandescent bulb wattages and the equivalent LED E27 bulbs by light output.
Old Incandescent (Watt) | LED E27 Bulb (Watt) | Indicative Lumen |
---|---|---|
25W | 2-3W | ~250 Lumen |
40W | 4-5W | ~470 Lumen |
60W | 7-8W | ~800 Lumen |
75W | 9-10W | ~1050 Lumen |
100W | 12-13W | ~1520 Lumen |