Intro and Biocube 32 fuge light help

I've always scraped the black film off the back pane and mounted a light behind the tank

 

When I had a 28g JBJ cube I used an LED which mounted onto the back with a magnet.
https://www.marinedepot.com/JBJ_Nan...quariums-JBJ_Lighting-JB9315-FILTFILD-vi.html

Seems kind of expensive for what it is, but if you're looking for a simple out of the box solution, that may be a feasible route.

 

I used to have a LED fixture, not sure what it was. Currently it is just a CFL grow light from walmart

 

Menards sells a small LED square that I picked up for $12 if I remember correctly. I taped it to the back of the BC.

Grows chaeto like crazy.