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