Ceiling lights in cockpit

This may seem a stupid topic but does anyone know how to change out a bulb in the cockpit ceiling of Catch My Drift, a 20015/2015 500c and where i can get a replacement part. The bulb unit appears to be captive

behind the chrome mounting ring.

They are not quite the same as ours - but for ours the chrome ring rotates anti-clockwise maybe 10mm and then comes off - exposing the screws that hold the unit in place.

Ours are sealed units and the “bulb” cannot be replaced - the whole unit has to be replaced.

Our boat uses…
BCM Orlando 3406-75C-B2W-S-04__30FXX_OS6

(3406-75C-B2W-S-04__BR3XX_OS6 as the red units)