Yes only one power supply is needed..
BUT each strip needs about 20V (typ. V(f) 19.5) so 2 in series requires 20x 2 = 40V
The drivers regulate the voltage to "set" the current..sounds complicated but its pretty easy..
you just need a power supply w/ enough voltage to satisfy the V(f) of the LED board.
Driver will decrease voltage to set the mA.. (it can't increase the voltage over the power supply.
LDD driver design dictates how much is err.. lost in translation.. 4V is a safe bet but it is actually a bit variable..
So, again 48V power supply only provides a 44 V potential on the other side of the driver.. 2 boards require 40 v so you are good to go..
a single board only requires 20V
In both cases the driver will regulate the voltage..
I use 3W diodes as well as bigger COB's..
The Bridgelux are really a nice "special" type of strip light..Not any different than stringing a bunch of 3W emitters, only individually smaller..
My 40B old frame.. After about 3 other iterations of experiments..
It was designed to illuminate the tank from top/bottom and front to back..
Crude but effective..diodes are currently a bit different as to ''colors" and it's due for one more small rebuild..
your tank has the same width approx.
Hmmm. besides crude drivers run low power and possib. questionable diodes, the DSunY's had fair power..and lensing
The Bridgelux diodes are prob. at least 2 if not 4x more efficient.
How about something like this?
Very early DSunY custom design vids: