The PIAA 510's are both a FOGLIGHT and DRIVING LIGHT
ION which is very similar to the IS300 is a FOGLIGHT that puts out a very wide beam, which is yellow btw
SUPERWHITE which is a driving light puts out a strong bright light that to be honest lights up the sides of the road enough for me.
AS for blinding oncoming traffic really isn't true as long as you don't aim them up, Mine are aimed just right to where
i can see alot better and further then my headlights can output, I also can drive with my headlights on and my piaa's too.
I don't know how much brighter you will make yours compared to the piaa's but whatever the case good luck.
The average price for the PIAA 510 are anywhere from $200-$230.00 (GB price was $165 and $175) Me personally i wouldn't pay $300.00 for a set of fogs nor would i pay the piaa price thats why i set up a GB.