At first, I only had one of the MagGrid but, after watching the MagMod videos of this I bought two more. Having watched the video, I could understand how they were used and for what. They crop the light down, you decide on on the cropping effect by how many you use. Three is the most I have and I build up to that to see what effect I want. they are very pliable and with the magnets, it is very simple and easy to change your setup. If you do not have any MagMod MagGrids, you need to buy two or three and give them a try, I know you will like the effect they can give you. "Thank you MagMod for producing such great products", J. Payne, Charlotte, NC.