Use a poster board, any kind of squared wood for bottom with edges & Christmas lights; cut any size holes in posterboard; Christmas lights sit on bottom of square; shape the poster board & use a thin line of hot glue to hold them together = nightlight.
BEFORE - see the Walla Walla lamp pin on this board - easily convert to this! AFTER Bohemian beaded lamp DIY. Part old jewlery, part old lamp. What if you used ribbon, or junk jewlery also in one tone, like 'pearls' or 'jade' type jewlery!