I have a pair of 6,000 degree Kelvin black body radiation H4 HIDs I tried to give away, also no takers. Funny thing my H4s have HID low beam but a halogen filament for the high beam, makes for an odd driving experience when oncoming traffic prefers the yellower, dimmer 4,000 degree high beam rather than the blindingly intense low beams. Certainly the HID low beam light output is astoundingly bright and offers the best illumination of the road and surroundings ahead..
Does your offered H4 bulb have H.I.D. output on both HI and LO beams?