Hi guys

Last night noticed my right headlight was out.

Had a look and it turned out the connector - small about 2 cm long, female, 3 flat pins on light, doesn't seem very secure- had come off. Put the connector back on (just pushed it on from the rear ) and now I notice that the light from this headlight is a lot duller and yellowish compared to that for the left headlight. The light ( looks like a sealed beam) is round, reads Hella, H4, E4 and several other codes. Would a good cleaning of the terminals bring the brightness back or should I look for a replacement? Will dielectric grease help protect it?. Are these lights readily avialable or do thety need to be imported?
All advice gratefully appreciated.

Thanks

John