The GT Ultra 120 H4 twin pack is normally $36.18, but powerbulbs are now offering a two-for-one deal, and combined with the 20% off code brings the price of the 4 bulbs down to $29.58.
The same deal is available for H7 bulbs here.
Advertising 120% more light than standard bulbs, and get good reviews too.
Thanks OP. Any experiences with these brands? I've only used PIAA and osram silver star ultras H7