Talk:Tutorials/Pumpkin/Melon Farm/@comment-195.0.224.148-20200312230330/@comment-76.170.48.78-20200325165052

You can but shouldn't. If you build ANYTHING above it (including more layers), even if it's day, it will be dark enough for mobs to spawn. Use glowstone or sea lanterns, or you can't build on your island.