How big of an improvement did you get?
MoparBob, I would have to estimate almost a 20% improvement in both low beam and high beam output by installing the Phillips X-treme Power bulbs.
It was enough of a change that instead of ALWAYS *****ing about my forward lighting when driving at night, I mostly stopped complaining because I could see down the road that much better. It is NOT a night and day difference (sorry, pun intended) but it IS a qualitative improvement.
I have not even yet installed the headlight relay harness, which Stern recommends, to bring higher voltage directly to the headlights. You get even more light output with the higher voltage, but of course at the expense of shorter bulb life. Stern's feelings are that being able to see even better at night is worth the quicker burn out rate and I would have to say he is probably right, I just have not gotten around to doing it on my truck. And now that I have modded my multifunction switch to allow me to use both hi/lo and fog lights at the same time, at least when there is no oncoming traffic, I have stopped complaining almost completely while night driving. The multifunction switch mod (link here --
https://www.turbodieselregister.com...31-bombed-multifunction-high-beam-switch.html ) is one of the best/cheapest mods to do on our trucks!!
It is really too bad that the headlights on our pre 2006 3rd gens are so poorly designed, but these Phillips bulbs atcually DO help enough to make a differnce. It is important to note that they are NOT simply a "brighter looking" bluish bulb, but use an actually improved filament design that throws more light. For $40, you really can't go wrong. I think that the link YoHoot posted even has a 10% summer sale right now.