We did a lot of experimenting with H4 high performance bulbs before simply listening to Daniel Stern, automotive lighting expert consult and to only carry the Tungsram Megalight +120 that he recommended. That leaves us with a couple odds and ends that we are selling at garage sale prices:
Philips RacingVision GT +200% - (2) sets available at $13.90 ea.
GE Nighthawk Premium +90% - (4) sets available at $13.90 ea.
These are both high quality currently available in the marketplace bulbs. Some rate the Philips RacingVision bulbs higher than the Tungsram but we're going with our expert.