I tried similar hoping to head off "ZOMGBADWRONGFUNIHAVEDARKVISION!!!" with some players who started with 5e when I tried to introduce meaningful light rules but the end result was less willingness to keep half way and more outraged resistance woven with loophole seeking for the sake of the loophole rather than any willingness to actually engage with the possibility that light and darkness could add anything. I highly doubt that if allow it again but could possibly see it as a very magic item in a game with old school osr shadow dark or similar type light & darkness rules