My low beams were inadequate from the time we bought the coach new, but the brights were great. I had the headlight alignment checked by a dealer and they said there was no problem. Because the dealer demostrated lack of competence & credibility in other areas I took the MH to a truck service place. They found the headlights were way off, "high and to the left." The re-alignment helped some (almost doubled the candle power according to their meter).
Then after a great deal of research, I replaced the low beam bulbs (I have two bulb system) with HIR bulbs. I went with HIR because the research indicated they are brighter (put out more lumens) than other bulbs that claim to be brighter than OEM, they put our very little additional heat compared to most high intensity bulbs, they don't glow blue like too many of the aftermarket bulbs, and they are are direct replacement for the standard bulbs after a very minor modification to the bulb (clipping off an ear on the plug-in socket). HIR are the same bulbs used in the Dodge Viper, and apparently in some John Deere equipment. The bulbs can be pricey from Dodge, but I got two online for $39 plus $5 shipping each. The HIR bulbs helped some, just as the alignment did. I still would like more light, but they definitely are better than they were at first.
Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad