Which Hydra should I go with whenever I decide to purchase lighting for my 120 gallon reef tank, should I go with the hydra 26 or 52? And also how many units of the 26 or 52 depending on which one it is, I don't want excess light to be blasting the room it's in or anything lol, my tanks 60 inches long, 18 inches wide and 26 inches tall. Thanks for any help! Trying to plan this right