The Minecraft 1.21 update added another use for copper: The Copper Bulb. This item is a light-giving block, adding yet another possible light source that you could use to light up your home or ward off hostile mobs. In that, it is very useful and it provides another use for an item that hasn’t had very many since its introduction.
Copper was added in the 1.17 update. Since then, it has only been useful occasionally. Finally, there’s another valid use for it. Here’s how to make the Copper Bulb in Minecraft and what to do with it.
Images via Minecraft Wiki
To make the Copper Bulb you must first and foremost have copper. This requires a stone pickaxe to craft, so make one and head into the mines. It’s not an uncommon ore, so you should find plenty and then it’s a simple case of knowing how to use the Minecraft crafter!
For this crafting recipe, you will need:
Three blocks of copper. Each block requires nine ingots.
One Redstone Dust and the ever-elusive Blaze rod. That is very difficult to find, as it’s only in Nether fortresses.
Once you have all of those items, you can craft a set of four Copper Bulbs. The blocks must be matching, though. So if you have a block of waxed copper and two unwaxed blocks, you’ll need to make them match before you can craft. If you’d like then to wax the Copper Bulb, you can add it and a honeycomb to the crafting table. You can then place your Copper Bulbs around your home as you see fit.
To activate them, you will need more Redstone. Like many non-torch light blocks, the Copper Bulb is a Redstone block. It will emit light when you send a Redstone pulse to it. This can be achieved with a lever, a button, or even an observer. When it’s activated, it will turn on and give a light level of 15. That’s the maximum in Minecraft, so these bulbs are already one of the best sources of light in the game.
Oxidation is something you do have to worry about with Copper Bulbs. Copper blocks of any kind will oxidize over time. This can be prevented with honeycomb or reversed with lightning or an axe, but it happens slowly. If your bulbs oxidize, the light level will diminish. There are four stages of oxidization and each changes the light level:
You might like the aesthetic of oxidized copper, but it severely diminishes the light you have. This can lead to hostile mobs spawning or just an inability to see. You have to decide how to use the blocks and whether or not to prevent/reverse the oxidization. If you’d like to break the bulbs, you must use a pickaxe. This does not change the oxidized level of each block, though.
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