Spring RTS Engine

This might belong in the feature request but I'm sure lua will suffice. Basically I've been messing with a high resolution normal map, which really shines when you can actually see the shading change as the sun rotates. Anyway basically I made a quick gadget that did this

Spring.SendCommands{"dynamicsun"}

I can't seem to find many(any) details on changing spring engine settings with lua, but I'm sure there's a much much better way for turning dynamicsun on and off through map options.
Any advice?

PS: It would be cool if this was a map option instead of an engine option as some maps bake in shading/shadows, hence fairly map dependent.

all day, and all of the night, the only time i feel allright, is with the sun on my side.

Inb4 My Solars, do not touch this

Not sure if relevant, but I'll post anyway:
http://springrts.com/wiki/Lua_OpenGL_Api#Lights
http://springrts.com/wiki/Lua_UnsyncedCtrl#Rendering