So, I really enjoy shooting at night and one of the problems I come across a lot is having too much light in some areas and not enough in others. I don't have any strobes and generally like the light patterns in the scene, I just need to balance it. I'm thinking some graduated ND filters might be the solution to this problem. Can some people share their experiences with square/rectangular filters? Any recommendations are where to start in assembling my kit? It seems that these are somewhat modular? I'd rather take my time buying higher quality stuff instead of buying a cheap kit right away. Thanks!