Hi im new too unity and the 3d world. I was wondering what the limitations are for lighting, any help (websites, tutorials and answers) will be much appreciated
Many thanks.
Yes and no.
Realtime lighting has no limits as the realtime lights are unlimited on both 
but without pro iOS pro you have no beast lightmap with GI only the normal beast, which impacts the static lighting quality - but if you calculate the lightmap outside you can overcome that one.