On my 97 E-series (I know, headlight before yours), I learned the most efficient thing to do was to put in Sylvania XtraVision headlamps. They are overdriven some for the increase in output, but not to the extreme the SilverStar headlamps were, thus they kept a decent life span (nearly that of the original). I used the van for expedited cargo transportation, so it has many hours of night driving like that.
The second piece of advice is to have them re-aimed. I found that mine were just a bit too high when loaded, and the high beams became no help. I bet that yours were aimed by Ford to factory specs, then the house was put on the back, lowering it considerably (and raising the headlight aim). Have them pointed down a bit to actually see the road, and not the trees.