One for the lighting gurus.
My tank is over 24"high so my water depth to substrate is around 28".
My lighting is a mix of 2 54w t5 and a 24x3w Cree LED fixture which is 48" long and the led's run in line.
These sit @ 30" from substrate (2" above water level)
I know that Tom used to run 4 54w t5 @ 1m above substrate in a 24" deep tank fine. I was wondering though if water depth would reduce the par levels too much.
There's a myth here in oz that tanks over 24" deep will need more intense lighting like in the form of halides or high output LED's
Is this true?