I have several questions. Do they work well in a small room? (stay in the area, not all over the room) They will perform within the parameters of the show you select. Of course in DMX mode, you can program them to shine exactly where you need them.
What is the shortest height you can use them? You can use them on the floor or on your table if you like. There is a built in program just for that.
How do you mount them? (hung upside down or sitting on a totem) Either way works well.
Do you use any other lights with them or will 2 of these work well for most small shows? Two are fine for most small / medium shows, nothing else needed.