When placed on its own, a redstone torch looks like a glowing red torch, although noticeably dimer than a normal Torch. However, it can't melt Ice or prevent mob-spawning like a normal torch, nor does it does not have the usual fire animation.
A redstone torch can provide a power source for Redstone Wires. Wires in turn are used to operate doors, pistons, or any redstone-effected block from a distance. The torch can power a wire from up to 15 blocks away, and takes one redstone tick (two game ticks, or 0.1 seconds) for power to flow through it. The torch gives off a redstone current on all four sides, and if there is a block above it, it will give a signal two blocks above on the block above it.
A redstone torch provides a weak power current to any block it touches (except the block it is attached to) and provides a strong power current to any solid block above it. It acts as an inverter in redstone circuits (or "NOT-gate", as defined in the game's code), and turns off when the block it is attached to gets powered.
|Redstone Torch||Redstone Repeater|
|None||Redstone||None||Redstone Torch||Redstone||Redstone Torch|
|Redstone Comparator||Activator Rail|
|None||Redstone Torch||None||Iron Ingot||Stick||Iron Ingot|
|Redstone Torch||Nether Quartz||Redstone Torch||Iron Ingot||Redstone Torch||Iron Ingot|
|Stone||Stone||Stone||Iron Ingot||Stick||Iron Ingot|