Product for lighten skin on the neck? My neck is the darkest place on my body..HELP.

From the little bit that I know about it, it seems people like Hydroquinone. Here is a Q&A about it to help you learn a little more:

Is Topical Hydroquinone Safe for Skin Lightening?

We do have a community dedicated to skin lightening, so you  might want to jump over there and check it out. We would love it if you would add any info you have about the topic as well. :)