Headlight/Electrical Problems

Bought 04 TB LS last week. Coming home last night seemed to notice my headlights dimming slightly and then getting brighter. Anyone had a similar experience. Any advice? Should I contact the dealer? After reading some of these posts I'm a little nervous.

I have a 2003 LS, mine does the same thing, it is def a sign of poor quality. I thought that the lights dimming on my 94 camry when i had a powerful amp/subwoofer hooked to the battery was crappy, but on a brand new 4.2 liter truck from just the fan turning on/off, thats ridiculous. Still, it doesnt seem to pose any problems, I think it is just a sign that the alternator is not powerful enough, or a poor electrical design. I dont even notice it anymore, though i am sure it still occurs.