dont get the cheap ones
the higher rating bulbs that are cheap dont last long
some just 3 months n burn already
go for a good trustworthy brand
they may cost as much as double the el-cheapo bulbs
but they last wayyy longer

philip lo
Philips X-tremePower +80% light
or bosch

Hella? I'm using now.. 90/100 watt.. Just to tell you, HELLA bulb got alot imitation. Even I kena before and charge me Rm35 per piece.. While now, I get original hella H4 bulb just for RM15. Original hella and imitation got alot of different in term of brightness..

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Added on January 8, 2008, 9:48 am

Add relay is because out stock car bulb is 55/66w watt which our stock relay can stand the heat. While if you use 90/100w bulb on stock relay, the relay socket and wire will melt. So that why we need to change to 90/100w. If you get 55/60w bulb, you no need to put relay because it still acceptable for the stock relay.

A reliable brand bulb is such like PIAA, Philips, Osram, Hella and japan brand 'raybirg'. If normal halogen stock, Hella and osram is cheap while raybirg also need RM30+ eachh.. For PIAA, it need rm200++ per pair while philips is from 75-RM200++.. You google at garage sales, got a seller selling philips rally. It good and cheap.. But it need relay.