Main Purpose: Works as a complete trailer tail light guard box set for your new or existing trailer, has stop turn tail lighting modes. Can be directly welded on or bolted on to the rear, side, bottom or top frame of your trailer | Excellent Brightness: Use bright SMD LED, lights output excellent high brightness red light for stop turn light, low brightness for tail side marker light and amber light for turn signals light. With a newly designed 3LED license plate light, provide maximum visibility and security, reducing the occurrence of the traffic accident | Solid Built : Made of heavy duty steel, painted with quality black powder-coated finish, and pre-cut holes for 6” oval light, 2” round side light & license plate mounting. Work perfectly in all kinds of bad weather | Simple Installation: All in a set and lights are mounted on the box. Just hardwire each pigtail wire to the corresponding wire on trailer. And then weld on or bolt on the light box to the trailer frame. For side marker light and licence plate light, white wire is Ground and black is positive. For oval light, black wire is Ground, brown for low brightness, red for high brightness and yellow for amber light | Removal Tips: Press down on the oval light with both hands and the light will fall off; Taking out the oval light and the silicone; Reaching into the oval hole with hand and push the round light out from the inside, and then taking out the silicone