stop standing under the sun for so long

I don't stand under the sun for so long. I'm using Aha+ from acne.org. Would that help to lighten up my skin?I'm using it at night so is it alright if i don't put sunscreen on my face in the morning?

I'm also using the acne.org regimen.

I use a 10% glycolic acid gel. It really does help with the red mark that acne leaves.