Hello I have a question for you. I have a 20 high tank. i want to be able to support sps and high light clams better The length is 24 and the width is 16 Every square inch of this tank is coated in coral could you get me an estimate i would want a 60 40 mix of white and actinic. and what ever the typicla lux is for a customer Also what do the green leds do for a tank?