I recently upgraded from a 90 to a 180...I was wondering,I need to upgrade my lighting from the 108 watts I had for my 90 to something with more wattage.But does it matter if I get two 36 long light setups to spread across the 72 inch tank or could I just use one 48 long set up and set it in the center of the tank?I know water reflects light.. I can save money by getting just the one 48 long setup around 150 -200 watts than buying two 36 setups...Whats the opinions here???
