There are so many options and they are all different sizes. You want something that is going to give you the most light for your money. You want to be able to use it with different types of lights. You want to be able to move it around to change the angle of the light, and be able to get the best light from any direction.
The best smart pot for indoor growers is the smallest size. A small grow light can fit into a space that may have been used for other things. A small smart pot can provide just the right amount of light and nutrients. It is also easy to clean.