I went ahead and cooked my level at my school (thankfully they have Unreal 3). I had decreased the lightmap resolutions all around so that my map was around 70MB... a reasonable number. Whenever I cooked it, the number dropped to a very pleasurable 45MB :)! This got me to go back and scrutinize areas that had discrepancies with lighting (in the form of whitish bands in between 2 side-by-side meshes). Right now I have increased the lightmap resolution of the most important areas, and it seem that a lightmap of 64 and above is recommending for lightmapping -- anything below isn't worth lightmapping, as it makes the mesh look even more screwy than before. I will be recooking the map later today and hopefully it will be released today.