Looking for something the shield light from my sump (Waterbox 10)

[Weebay]

Like the title says. I installed a light for the chaeto I recently put into my sump but the light shines through the back quite a bit. I am looking for something to slide into the back to block the clear glass on the back. I have found some plastic sheets that seem like they may be a good option (on Amazon) but I'm not sure if they are reef safe. Anyone know of a good option that is reef safe?

Looking at something like this:

 

[Derrick0580]

Corrugated plastic would work

 

[Raptor72]

What light are you using?

 

[Derrick0580]

I have an ai prime 16hd but I bought the vca light shields that mount to the bottom of the light.

 

[Derrick0580]

Thought I ordered the ai fuge light but managed to order the regular reef light instead. It actually grows chaeto like crazy. All channels on 75%

 

[Weebay]

What light are you using?

The innovative marine nano one.