![]() It is unwise to run even one or two 100-watt lights off a simple switch in the dash without the use of a relay. This high-amp draw requires the use of heavy-gauge wiring and relays. Of the three light technologies, halogen lights consume the most power and place the greatest demand on an electrical system. Combine this with the engine ignition, fuel pump, heater blower motor, and the other electronics in your 4x4 and you could be challenging your charging system. However, when you mount four 100-watt lights to your 4x4, they have the potential to consume more than 33 amps. ![]() By itself, one light is not all that big of a deal. A typical 12V 100-watt halogen light will draw slightly more than 8 amps. As expected, the higher-wattage lights draw more current too. The higher the wattage is, the brighter the light will be. Halogen lights are available in many different wattages the most common being 55 and 100 watt. ![]() ![]() So you can forget about duct taping grandma’s vintage desk lamp to your front bumper. However, the design and function of a halogen bulb makes it more vibration resistant and allows it to last longer and shine brighter than an incandescent bulb. Halogen lights function similar to a traditional incandescent light bulb, where electricity is used to heat a tungsten filament and create light. They were the only game in town for several decades because the other off-road lighting technologies had not yet progressed and become affordable. Halogen lights are the oldest and least efficient of the three prevalent off-road light designs. ![]()
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