Re: Suburban needs more light
Many US vehicles except for the past few years had poor lighting patterns and better bulbs don't do much, as was noted. I was able to get a set of ECE (european spec) aftermarket headlamps for my 98 Jeep (made by Crown manufacturing) and they are much better. They use the superior H-4 bulb. You can get some improvement with fogs for low beam and driving lights for the high beam, if they are legal in your state. Do a search for Dan Stern Lighting. He has a website that will give you many options, and if the ECE lamps are available for your vehicle, he may know how to get them. If it was ever sold in Europe they must be out there. The aftermarket HIDs I hear bad things about.
Another option, although pricey, is this. The base model Subs in that style did come with a different grille, with single large rectangular lamps. Also used on the 1500 work truck models. These lamps can be replaced with the large Hella rectangular H-4 Euro headlamps, and they are easily available. Not legal in all states though. I used them in older cars, before these composite lamps came out. You'd have to replace the grille and the wiring may have to be changed/upgraded. But in my opinion (also have poor night vision) worth it.