Surface-mountable light fixture having an access port and corresponding method and kit

A surface-mountable light fixture can comprise a base that is configured and arranged to be mounted in an installed position juxtaposed against a mounting surface. At least one light source interface that requires mains electricity is contained within this base. This base further comprises an access port formed therein which, when opened while the base is mounted in an installed position on the mounting surface, provides end user access to electrical conductors for the light source interface(s) as well as the mains electricity. This base then also further comprises a lockable cover that is configured and arranged to selectively and reversibly seal the access port to deny end user access to the electrical conductors.