If all you want is to control star bloat, an UV/IR cut is much cheaper and quite effective.
If you want to reduce a bit of light pollution, I'd say the L-pro should work fine. Note that's "a bit" of light pollution, the L-pro is not very strong.
From the data I've seen, the L-pro and similar filters do cut UV/IR to some extent, but not all copies have a hard cut like a UV/IR would. I've seen data suggesting there's some IR pass on the far IR range. So they're not perfect in this regard, just "adequate".
I use an Orion 5561 quite effectively, but not on its own. I have a CFW with LRGBSHO, and when I'm doing LRGB I'll slap the 5561 to the CC/FF, so I double-filter. I would leave the L slot clear in that case, and only use the 5561 with L and B and not with RG, but that causes backfocus complications, so I'm lazy and just keep both filters (the LRGB and the 5561) in place. That shields me from UV/IR bloat, even though it's not my main concern (the 5561 has a UV/IR drop, just as the L-pro), so YMMV if you use only the L-pro instead.