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The Department Of Transportation has set guidelines for us to follow if we want to drive on public roads. Your low beam is not to exceed 55 watts and high beams are not to exceed 60 watts. Since the 70's, people have been installing higher wattage bulbs in their vehicles to get more light and just like in your favorite desk lamp, if you change from a 50-watt bulb to a 100-watt bulb you get almost twice the light. It is legal to run higher wattage “off road” and many people use this type of bulb on the street, but we do not recommend it. If you want to run these types of bulbs, they are much brighter, but there are some things to think about. These bulbs produce more light and subsequently more heat. We have never heard of these type of bulbs harming any headlight lenses because most lenses are a high strength polycarbonate that is very resistant to both heat and impact. But because of the current draw, almost doubling it sometimes can put a strain on your wiring. Frequently check the connectors on the back of the bulbs to see if they are overheating or appear to be melting. If this occurs you will need to buy a heavy-duty wiring harness to run these bulbs