You’ll like them. You probably won’t need the t5. Depending on the intensity you set , you can overpower them pretty easily.
I own 4 btw. One on the cube 3 on the 55.
To avoid the shadowing so many are concerned with, try to work out the height you want to mount them.
Sooo many folks set lights really low on the tank.
Try this with your SB.
If you set the beam inside the square , you’ll have more spotlighting and shading , outside the square you’ll have less shading (but an angry wife with sunglasses ).
At 12 w the stock lenses in , a 16” cover about a 20x 12-14”. With the hot spot in the middle. The hot spot is actually nice as it punches the bottom of the tank well , but might not work well depending on your aqua scape.
To increase this and mount lower many are pulling the stock lenses. Ive got a majority of the lenses pulled on my 30, and I use diffusions on my 55, as they are only about 9in above the water.
Not sure what specific questions you have on spectrum, but the Light def grows corals and hits all the major points.
It’s all pretty dead on , and the graph is a good representation of how the light looks. Note the extra bump in violet , it makes the blue only a royal blue.
I highly suggest a meter to set them, and consider the par range you want to work in.
A $15 lux meter actually work well , and when ya finally get that thing wet , I can help ya out with the lux Par conversions depending on the ratios you settle on
