White wire + Red wire: 100% brightness This double semi truck lights is widely fit for 10-30V vehicles, such as trucks, trailers, pickups, RV, buses, lorry, vans, caravans and heavy-duty trucks such, etc. IP65 Waterproof: The trailer fender lights provide IP65 protection against water, making it the perfect companion for rainy, foggy or snowy adventure; Say goodbye to worries about water damage and hello to reliable performance Providing a comprehensive lighting solution for various driving scenarios , Product Size: Dimension: 4., 17x4., 17x1., 7. White wire + Black wire: 50% brightness. 48 Amber/40 Red LED Double Face Turn Signal Light - Transparent Design... Each double face LED light with 48PCS High Brightness LEDs (Front 24 x LEDs + Back 24 x LEDs) FUNCTION: These round dual face LED trailer lights are perfect lights to mount on your truck or trailer side fenders, you can use them as parking lights, rear turn signal lights or brake stop lights, turn signal lights, side marker lights, etc. Double Face: Dual face illumination that significantly boosts visibility for your truck. The Black wire is ground(negative), Black + White is low brightness, and Black + Red is high brightness IP65 Waterproof Truck Marker Lights 4" Round Pedestal Fender Lights, 48 LED Double Face Turn Signal Light Semi Truck Trailer Towing 2pcs Amber Red Marker Tail Light Tractor Rv Brake Runni Red Light For Face