I don't either, but I see self lighting packaging for guitar picks as well past any grey line.
Personally, I think environmental issues need to be weighed with economics and human needs, wants and comfort etc. so I don't think everything needs to be packaged in the most environmentally friendly and 100% recyclable packaging possible. It needs to make sense and hit a reasonable balance with there being a wide range of reasonable. A box with and LED and battery that is a novelty for a few seconds doesn't make any sense to me, and I have a hard time seeing that as reasonable or responsible. That's merely my opinion, YMMV.