can the bulbs be changed to a brighter set on my 2004 3/4 ton dodge?

 

Welcome aboard.

Yes they can. This topic has been discussed often; try a search here. I installed Sylvania Silverstars (about $34 at Wally world) and like the brighter light. Piaa's are also popular, but I think more costly. Again, try a general search using the word silverstar in the past year or so - you'll have lots to read.

 

The big question is are you talking about when towing or empty???
I believe the lamps are set for towing. It apears to me that when I am loaded I get a better light pattern

 

Lumens, wavelength and aimpoint are three different animals. They have nothing in common.

Fact is, my lights were dim towing or not. Not anymore.