Brighter headlights 90 4dr 4AFE

Does anybody know where I can purchase a bulb for my headlamps without damaging the electrical system. I have seen several ads for no 88-92 Corollas advertising a "brighter/whiter" beam. Any comments would be appreciated.

Thanks

Please, when you get the info on the best halogens for 89 Corolla, send it to me too.
thanx.
Flav.
I have GE bulbs from Discount Autoparts and still poor on front lights.