I did not undestand. Different from what?
The plexy i'll use is widely used in marketing busines for marketing panels production, and has 10 year warranty for non-yellowing.
So, I plan to put just one silicon spot to connect each cell to that plate, and to put some spacers to support it to aviid movement to the front. At the back, It would be supported with two bars, not allowing it to go backwards.
If they often use it for marketing panels, even painted to black, why couldn't I use it? Maybe to arrange some ventilation to improve air flow and so cool it better. Let's say two or three holes near the low end and the same nar the upper end, on the plate between the cells (quasy square).