Lighting devices (13) which comprise a connector portion, a light emitter (15), a casing (16) and a heat transfer component (14). At least a first portion of the heat transfer component which is in contact with the casing is spaced farther from an axis of the connector portion than a second portion of the heat transfer component. Also, fixtures comprising a housing, a socket (12) and at least one heat transfer component. Also, lighting assemblies comprising a housing, a socket, a heat transfer component and a lighting device which comprises a light emitter and a casing, respective portions of the heat transfer component being in contact with the casing and with the housing. Also, lighting devices comprising means for transferring heat, and methods of deploying lighting devices.