Abstract: Apparatus for lighting the interior of a conventional metal mailbox having a rectangular bottom, a curved top and side section, a closed rear end, an open front end, a hinged cover pivoted about the horizontal base and having at its top a latch which when the cover is closed against the open front end of the box couples with a matching latch mounted at the top of the front end of the mailbox, the apparatus comprising an incandescent lamp having two terminals mounted in a socket depending from the top of the mailbox, a dry cell battery contained within an insulated case mounted beneath the bottom of the mailbox, a push button on-off switch having two terminals mounted on the latch at the front end of the mailbox, an insulated line connecting one terminal of the battery to one terminal of the on-off switch, and a second insulated line connecting the other terminal of the on-off switch to one terminal of the incandescent lamp, the other terminal of the battery being connected to the other terminal of the incande