Lumen bright mini or large

[reefndude]

About to order the lumen bright reflectors. Should I go with the mini or large? Tank is 5' x 3' x 27"

 

[A. grandis]

If you get the 20 X 20 (large) you can put closer to the surface with more spread.
The 16 X 16 (mini) you'll need to bring higher to spread a bit more.
I think you would need to look into the wattage you're choosing to use and visualize your aquascape to decide.
The thing I like the most is the adjustable sockets!
Grandis.