Abstract: A portable electric light device comprises a body having a longitudinal bore with closed end of small diameter, a central part of larger diameter and an open end of increased diameter internally threaded. A switching, sealing and closing cap has a threaded projection for extension into said body. A flashlight bulb is nested in the small diameter bore and a dry cell is nested in the central bore portion in engagement with the bulb. A conductor wire is secured to the bulb base, and extends along the dry cell within the intermediate bore and terminates in a coil spring normally spaced from the contact end of the battery. The cap projection has a socket which guidably receives the spring. Rotative assembly of the cap to the body moves the spring into engagement with the battery to energize the bulb and at the same time seal off the interior of the body.