no, cleaners stay well in/on rocks near the bottom mostly, i have never seen one jump anywhere. as far as lights go, thats all going to depend on what corals you wish to keep, for just fish it doesnt matter, but you will want to look up what corals you want, and see how much light they will require, making sure you have enough light for the highest lit coral up top, is the best way to figure it out. there are alot of theorys about light to water, but its nothing solid