A pet collar or harness includes several series of light emitting diodes (LEDs). The series of lights are controlled by a remote, hand held unit. The lights can be set to flash, or some lights can be brighter than others, some lights can cascade while some lights pulse. A power source is located on the collar or harness and a power source is located in the remote control unit. One form of the pet collar or harness includes a light sensor operated circuit in the collar so the collar or harness is automatically activated when ambient light falls below a certain level. Another form of the pet collar or harness includes a motion detector circuit in the collar or harness so the collar or harness is activated only when the animal moves.