LED Light Bar Wiring Harness 12V 40 Amp Relay with Heavy Duty 16 Ga AWG Wire for Off Road / ATV Light Bars Up To 300W / 50 Inches On Off Switch UP TO 50 INCH LIGHT BARS: & 300 watts. This heavy duty designed 40 amp relay - switch is designed by our electrical engineers who took the best selling wiring harness (rymes with Lamphus ;)) and read their reviews and designed a better safer wiring kit. Our engineers said it is necessary to use a 16 gauge wire (not 18) throughout to handle the current of a 300w or up to 50 inch light bar. Read their reviews and decide. DURABLE: As you can see we wrappped our harness in a weather and damage resistant sheath and use the highest quality components to ensure years of trouble free use. Our factory manufactures the relays so we did not go looking for the cheapest Chinese parts to assemble this kit for you. Long term customer satisfaction and building relationships for life is our goal. WEATHER PROOF: IP65 certtified red LED illuminated on off switch was a necessary edition knowing how hard many of our customers go. Off Road durable for extreme shock and vibration and water resistant for you amphibians WIRING KIT INCLUDES: 1 IP65 waterproof red illuminated on off rocker switch, 9 feet of harness wiring with dual wire leads, 9.5 feet of neutral (white) wire (from harness), 6.5 feet of power wire (red for switch), 3.5 feet of ground wire (black for switch), 30 amp blade fuse, 40 amp relay and 4 insulated male wire connectors (for light bar leads) BUY WITH 100% CONFIDENCE: You are covered by our 100% Satisfaction No Questions Asked Guarantee and full 1 year warranty. 40 Amp 300 Watt relay wiring harness 16 Gauge (AWG) Perfect for your Jeep or Truck! 1 IP65 waterproof red illuminated on-off rocker switch 9 feet of harness wiring with dual wire leads 9.5 feet of neutral (white) wire (from harness) 6.5 feet of power wire (red for switch) 3.5 feet of ground wire (black for switch) 30 amp blade fuse 40 amp relay 4 insulated male wire connectors (for light bar leads)