# Bulb holder Synergy21 S21-LED-000355, E27 fitting, white, single pack

**URL:** https://aio.lv/en/product--synergy21-s21-led-000355--12099378
**Data updated:** 2026-03-20 09:52 (EET)
**Category:** LED accessories
**Manufacturer:** Synergy21
**Manufacturer code:** S21-LED-000355
**EAN:** 4038816865120
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Synergy21 S21-LED-000355 is a white bulb holder with an E27 fitting designed for use with LED bulbs. Supplied as a single unit, the holder provides a standard E27 connection for residential or commercial lighting fixtures, enabling installation or replacement of compatible LED lamps in ceiling, lamp or fixture sockets.

## Long description

Synergy21 S21-LED-000355 is a white E27 screw-base adapter that converts a single E27 lamp holder into two E27 sockets for use with LED bulbs and other standard E27 lamps. Supplied as a single unit, the adapter enables installation of two bulbs where there previously was one, allowing increased light output or a more evenly distributed illumination without replacing the original luminaire.
Advantages
The adapter offers a mechanical solution to expand a single E27 socket into two independent E27 sockets while preserving the standard Edison screw connection. It is compatible with a wide range of LED lamps and other bulbs with E27 bases and is suitable for many domestic and commercial fixtures. Installation is tool-free: the adapter simply screws into the existing socket and the bulbs screw into the adapter.
Suitable for
 Increasing overall light output in rooms where the existing fixture has a single E27 socket
 Creating multi-bulb fixtures from a single lamp holder for more even illumination
 Adapting vintage or decorative luminaires to accept two modern LED bulbs
 Temporary lighting solutions in workshops, garages, or event spaces
Key specifications
 Socket type: E27 input to 2 × E27 outputs
 Compatible lamp types: LED and other lamps with standard E27 bases
 Connection: Edison screw (E27 thread)
 Application environment: indoor luminaires and fixtures designed for E27 sockets
 Color / finish: white
How to use
Switch off power to the fixture before installation. Screw the adapter into the existing E27 lamp holder until it is securely seated. Screw two E27 bulbs into the adapter's output sockets, ensuring each bulb is properly tightened. Restore power and confirm both bulbs light as expected. Verify there is sufficient clearance inside any shade or cover and that the combined bulb types and wattages are appropriate for the fixture.
Usage recommendations
Use LED bulbs with lower heat output and appropriate luminous flux to minimize heat buildup and improve energy efficiency. Check the maximum rated wattage of the original fixture and ensure the combined wattage of the two bulbs does not exceed that rating. Do not use the adapter in wet or outdoor-exposed fixtures unless the luminaire is specifically rated for such conditions.

## Specifications

| Feature | Value |
|---|---|
| Product colour | White |
| Fitting/cap type | E27 |
| Compatible bulb types | LED |
| Quantity per pack | 1 pc(s) |
| Compatible fitting/cap type | E27 |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Synergy21 products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Synergy21 service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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