Jack o'Lantern

Jack-O-Lanterns are a new feature implemented by Notch in the Halloween Update of October 31st 2010. They are intended as a purely decorative addition although they can also be used as a light source. Their luminance is somewhat greater than that of the torch. They appear identical to unlit pumpkins in the inventory.

Jack-O-Lanterns are useful in that they never go out, making them much more useful than your typical torch, which will go out in the future. Notch thought this to be a logical step in the development of the game, as it adds a new level of danger, while any living quarters will require a bit more maintenance until you've replaced all torches with Jack-O-Lanterns.

A Jack-O-Lantern is created by combining a pumpkin and a torch (See Crafting below). Video guide on how to create Jack-O-Lantern below as well.

Glowing Jack-O-Lantern Tutorial

Trivia

 * The Jack-O-lantern, unlike the torch, can be placed underwater and can still stay lit. Making it one of the best sources of light for water.
 * In SMP, if a Jack-O-Lantern is placed on leaves then the block will be placed but it will not be removed from your inventory, effectively duplicating the block.
 * As with the pumpkin, a Jack-O-Lantern can only be placed if there is another block below it. However it will remain in place if you remove the block below it after placing it.