Legal street use????? That's what stock headlights are for.
I've been running bright lights on most of my vehicles since my first car way back in 1972. I'm very careful about not blinding other people. I'm also a firm believer in having the lights adjusted properly. I adjust my stock headlights with my trailer attatched so the lights don't annoy other drivers when I tow. I never get flashed by oncoming traffic. Out of adjustment headlights because of towing or having a load is one of my pet peeves. At work I drive somewhere between 600-700 miles a week at night and see a lot of out of adjustment lights.
As uncle Ben says "With great power comes great responsibility".
Just for fun, this is a picture of my motorcycle light setup
2-Hella Micro DE HID's, 2-PIAA 525 ATP's and upgraded bulbs in the stock high and low beam