My EG headlights also pretty dim. A quick "fix" i did was installing OEM foglights to provide extra lighting. But i think the best option is actually replacing the headlights themselves with new ones. Offcourse depends if you have the budget. If on budget, best to clean the headlights like aalto said.
I have already actually ordered some new headlights myself, after install hope lights will be brighter. If it isn't i think i will have to get the wiring looked at..