Just check the bulb mate...it sounds like it is justing showing as the park light...and not the proper main beam (not to be confused with the high beam!). I reckon the filament has gone.
Flick the light switch one position to parking light, and have a look at the brightness, then up the switch to main beam and see it it increases in brightness in any way.
If not, then I think its just the filament for the main beam gone. If it does a little, but not enough, then perhaps the problem lies elsewhere as mentioned before.
[Edited on 3-4-2006 by Harv748]