more lights are needed and they need to be a lot closer... but be careful! while burning leaves is no real big deal, burning the buds IS! more and closer lights will help the buds fill out more.
cant tell for sure from those pics, but it looks like you have a bit longer to go on flowering.... they look decent though, so be patient! the longer you wait, the better your yield will be.
if you dont have a magnifying glass/microscope/jeweler's loupe to look at the trychs closely, you will have to give it a best guess on harvest time... right now, there are no signs of crystals on the bud leafs, the buds look awfully white and the nodes have not filled up with bud yet.
wild assed guess: 2-4 weeks.