United Pacific 37132 21 LED 4" Stop, Turn & Tail "Glo" Light - Red LED/Red Lens, 1 Pack 21 LED 4" round use/T/T & P/T/C "Glo" light Red LED w/ Red lens Unique patent pending "Glo" design, halo effect on running, all LEDs lit on stop 3 contact Female terminal Recommended plug: item 34212/34216