I spent alot of money on them and they are great for viewing but dont spend alot. After about a week you just end up turning off the regular lights and dont even bother with the moonlights. Usually only on special occasions do I turn mine on now, or if I want to check on my TSN and make sure he isnt swallowing another pleco, so now at second thought, go fo it if you have nocturnal fish you would like to view once in a while, just dont spend alot.