Spelunking stuff & Bats

So I was playing Minecraft Dungeons when I saw the spelunking armour and I got the idea to bring some of its functionality over to Minecraft's Cave's and Cliff's update.

The helmet of that armour set has a candle attached to it, which in normal Minecraft could add as a portable light source with the new candle item.

Another feature of that armour is that the bats become a pet that attacks mobs like a wolf, I feel like this feature would add a huge use to the bat which currently has no use, and it would fit the cave update aspect.