Scandvik G4 Bi-Pin Socket Adapter, BA15S to G4, Rotating 120° – 41121P
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BA15S to G4 Socket Adapter for LED Bulb Upgrades – Rotating G4 Bi-Pin Socket
The Scandvik 41121P converts a BA15S (single-contact bayonet) fixture socket to accept G4 bi-pin LED bulbs. The G4 socket inside the adapter rotates up to 120°, allowing the LED bulb to be oriented correctly within the fixture housing — important since G4 LEDs are directional and orientation affects light output through the lens.
Also compatible with MR-16 base bulbs that fit into G4 socket adapters. SKU: 390-41121P.
Key Features
- Converts BA15S (single-contact bayonet) socket to G4 bi-pin
- G4 socket rotates up to 120° for correct LED orientation inside the fixture
- Compatible with MR-16 base bulbs that fit G4 socket adapters
- SKU: 390-41121P
Best Use Case
Use this adapter when upgrading a BA15S bayonet fixture to G4 LED bulbs. The BA15S is a single-contact bayonet base — common in marine courtesy lights, reading lights, and cabin fixtures. The rotating socket is particularly useful in enclosed housings where the LED chip must face a specific direction to maximise light output.
Parts Desk Insights
Confirm your fixture uses a BA15S (single-contact) bayonet base before ordering — BA15S has one contact pin at the base, while BA15D (double-contact) has two. Using the wrong adapter will result in a non-functional installation. For the BA15 (double-contact) to G4 version, see the Scandvik G4 Bi-Pin Socket Adapter, BA15 to G4. For the E27 to G4 adapter, see the Scandvik G4 Bi-Pin Socket Adapter, E27 to G4 – 41122P. For G4 LED replacement bulbs to use with this adapter, see the Scandvik G4 LED Replacement Bulb, Warm White – 41072P or the Red – 41033P.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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