Abstract: A light device (10, 30) is described which comprises a first portion (12) configured so as to partially define a housing, the first portion (12) being arranged so as to at least partially pass light therethrough and the first portion (12) including first electrical contacts (46, 48) and a first locking device (50), a light emitting element (15) disposed in the first portion (12) and being electrically connected to the first electrical contacts (46, 48) and a second portion including a battery compartment (56), second electrical contacts (52, 54) arranged so as to be in electrical connection with batteries disposed in the battery compartment during use, and a second locking device (62, 64) engageable with the first locking device (50) so as to releasibly fix the second portion (13) to the first portion (12) during use and thereby close the housing.