Need some ideas on how to mount T5s along the front and back of each Vipar pointed inward and down. Would rather not spend an arm and leg for a hybrid fixture
I'm not familiar with vipar, but here is how I did mine.
I initially had a pair of T5s with a diy led.
Later I added 2 more T5's. You can see in the picture above the T5 retrofit kit is mounted a couple of wood strips. When I went with 4 bulbs I replaced those straight pieces with ones cut at ~15 degree angle. That pointed the T5's toward the middle of the light fixture and tank.
Of course I had to build the hood and the mount too.