80/100 watt bulbs are not legal for street use in MN, so check your local DOT before you buy these and blind oncoming drivers. There is enough road rage on the streets without adding more contributing factors. If you need extra driving light for desolate country roads or in the woods, get some aux. driving lights or even a flood pattern to give you a good view. You can switch these off after you hit the streets again. I have been impressed with the Sylvannia Silverstar bulbs. They really do brighten things up, however, they also tend to burn out in a 6 month time frame, most likely due to heat.