Here is a quick and easy way to put more light in your path. This is one of the easiest and cheapest modifications you can do to your rig.
Here is an ascii diagram of the modification:
foot in-dash Battery switch light switch | o-------------|) high beam o-------------------Relay----|-----\ | | \ round | o-------------|) low beam | | |____________|
Here are the directions:
What this does is only uses your in-dash switch for the control voltage to the relay so it still turns the lights on and off. Any time your lights are on high beam the low beams will also be on, giving you more light.
You'll need a continuous duty relay rated at around 30 amps and an inline fuse for about 20 amps depending on what wattage bulbs you're using.