I noticed that our '03 Accord headlights were varying between two brightness levels recently. A bit of research turned up Honda Service Bulletin 05-034 which addresses this issue. It is caused by a poor solder joint internal to the Electronic Load Detector (ELD).
In the case of the Accord the repair involves replacing the entire under-hood fuse box. On some vehicles they are able to replace the ELD as a stand-alone item while on other models it apparently is integrated into the fuse box.
I'm happy to say that Honda paid for the replacement 100% as a goodwill adjustment even though our car was past the warranty mileage. One thing I like about Honda is that they seem to stand up and pay for design/manufacturing defects even if the customer is technically SOL due to warranty limitations. This certainly was never my experience as a GM customer :(.
Any company can produce a product which has a problem, but Honda seems to be one of the few which goes the extra mile to make customers whole. Seems like a smart advertising strategy to me!
John