We experimented with a number of high performance bulbs before discussing these bulbs with Daniel Stern, expert automotive lighting consultant. He flatly recommends the Tungsram (GE) MegaLight +120 as the best bulb currently available and we are offering that exclusively.
We have a limited quantity of two others that we are not offering moving forward. Nothing wrong with them and they are both being currently offered in the market.
Philips RacingVision GT200 +200% H4 Bulb
GE Nighthawk Platinum +90% H4 Bulb
Two bulbs in each package.