Hmmm... Would a glass panel get shattered by the upwards heat from an RHP? I'm just trying to understand how the RHP itself works and what parts get how hot and how it attaches. I'm pretty good at working out what will and won't work once I have more info, but the info that I keep finding doesn't have the exact information I'm looking for to understand how the RHP mounts or what its temperature is on the 'nonlens' side. Maybe I could get a custom-cut sheet of glass instead. I'm not so worried about ventilation because the terrarium in question has front vents and vents on the back of the top. Even if I put a piece of glass on top, I'd still have more ventilation than most bin setups.
Can't really use glass, there's no way to attach the RHP.
You can attach the LED lights to the plywood, just like the RHP.