Review on 🔵 Partsam 10-Pack Thin Line 3.8" 6 LED Blue Side Marker Lights for Trucks, Trailers, RVs, Vans, SUVs – Sealed, Indicators, License Decoration Lights by Rud Starks

Blue plastic cover. It is not clear whether the LEDs emit blue light or whether they are white LEDs with a blue cover. I do not care. The light is brighter than I expected and I could almost read under a panel light (six LEDs) if the light were white. The BLACK wire is earth/ground. remaining wire. regardless of color. goes up to +12 volts. Both wires exit in the center of the back panel. When installing on a flat surface, you must either drill a hole for the wires or use standoffs to leave some space between the back of the panel and the mounting surface. I actually bought them to give my houseplant some extra blue light. I think they are perfect for the job. and the price per plate is great.