NEW - Galileo LED system from Pacific Sun

[Aqua-Digital]

This SO depends on the aquascaping of your system, if it is wall to wall SPS like my 24" cube then I would go for either the Black Python (like I have) or two of these.

However if you are less dominant in SPS and can afford to either raise the fixture or do not have SPS from side to side then one would suffice.

The spread of these units is wide, no optics = natural 120 degree spread so it gives a lot to play with but if stretching its band, you will get PAR drop off on the outer limits.