ELECTRICAL ISSUE - FAN/LIGHT COMBO?

I have a ceiling fan/light combo in a room that has been installed for 4 yrs or so. The light was bright (normal light) 2 days ago now the light is dim. I have changed the halogen bulb, cleaned the light cover and it's still dim. Any thoughts? Thx.
Update: I don't smell any smoke/fire - nothing. No sparks or flickering.
Update 2: Should I be using this light?
7 answers 7