Thanks so much for your reply, that does make a lot of sense! I am looking to upgrade the lighting on my 90 gallon, should 2 of these lights be all I need?
http://www.aliexpress.com/store/317...-120w-55x3w-led-aquarium-light-with-Lens.html
Do I need optics for a 24" deep tank? Does Evergrow sell any lights for a 12 gallon nano? Thanks!
Has anyone hooked these lights up via apex VDM? I want apex to control the dim the lights!