Sounds like a good plan to me.
Out of curiousity, I fully disassembled the sensor on my Extech LUX meter. There are no identifying marks whatsoever on the actual photodiode. But here's the filter:
Close to what I'd expect from a LUX meter that's intended to mimic the human sensitivity to green. A bit more blue than expected, but that may be to compensate for photodiode response; which is probably biased towards red.
I also tested it for UV/IR pass. Only slight UV reduction. But it's a very good IR filter, I can't see the otherwise bright flashes from a remote control with my camera at all.
May come in handy later should you ever decide to play with alternate filters.