hi i have 3 g13 t8 fluorecent tubes in my tank, ive two switches, so i can either have one on, or two on, or all three, but i only use one, as i find this is enough, decided to buy a blue flouresent tube and just have that on, i do have blue led lights on at night but i think the tube will look great shinning down on my babies, cant wait for it to arrive , im allways spending money on wee things cant help my self when it comes to my tank, i have so many things that have been in my tank, will have to have a sale soon, lol xxxxx