Is this :violent1: because there are more comments on what is inneffective, poor quality or both? It's not that hard, Dan covers it in Post 11, but I'll sum it up here and add some comments on the H4s.
Your choices are:
H4 lamp assembly & bulbs
- these draw approximately the same wattage as stock but are more sensitive to low voltage
- its still a very good idea to install a relay system because headlight wiring, A-bodies in particular, was marginal to begin with.
- they have a strong horizontal cutoff which is very helpful in reducing glare and reflection in fog and rain.
- they've been in use since the 60s, and one version is even DOT marked, although it won't fool any concours points judge (unless you're claiming your car was a rally car*) but it will satisfy state inspectors if you happen to live in a state that cares (NJ was one of the few). * For an historic rally car done period correct, the DOT marked ones are wrong anyway.
BiXenons
- Expensive
- Draw less than stock, so no relays really needed
LED
- Not nearly as expensive BiXenons
- US Made options that are decent quality
- Low current draw, so no relays really needed
You can be sure that if Dan recommended a particular brand and model, it will have a lighting pattern that will put light where you (the driver) need it, without blinding others on the road (if aimed properly).