there are a lot of ways to improve the lights on your vehicle. but first i would suggest that you stay away from clored bulbs. meaning, those bulbs with colored lenses, because they become translucent, meaning less light will pass thru than clear ones which are transparent. meaning almost 100% light will be transmitted.

for cars with halogen bulbs, you install a relay harness. this will improve lighting by 50% over stock wires.

with non halogens change to halogen inserts. and add relays.

i use IPF 170/100 watt bulbs for m pick-up. and it it really bright, the box has label for off-raod use only. he he but i use it in the streets.