So this time I made the lighting maps of my entire spreadsheet and ran them through Sprite Lamp to make my normal map. This is the output from within Sprite Lamp itself since my shader I wrote isn't working on images that aren't square and its too late to fix it...

The Sprite Lamp process for making this normal map was about 40 minutes. I found some shortcuts as I went along so I could probably do it in the future in about 25 or so...

First image is the tileset

Second is the left lightmap

Third is the top lightmap

Fourth is the normal map generated by Sprite Lamp

Fifth is the Sprite Lamp preview

Sixth is a different preview