Abstract: An illuminable pet collar including a housing for a battery power source and an elongated, flexible, pliable, transparent plastic display tube having a plurality of spaced apart miniature lights operably connected therewithin and along substantially the entire length of the display tube. The housing includes a stem or extension tube extending from each end thereof sized to be snugly inserted into each end of the display tube. Electrical connection between the battery and the outer surface of one stem communicates electrical power to the lights which are parallel-wired within the display tube to allow for the shortening of the display tube to any desired length by severing through the tube (and the wiring between the lights, if required). A switch on the housing activates the lights within the display tube as desired.