Redstone Lamp
A redstone lamp is a full bright light block that turns on whenever it receives any redstone signal and turns off when the signal stops. It is the simplest way to see a circuit working.
What is a redstone lamp?
A redstone lamp is a block that lights up when powered and goes dark when the power stops. It only cares whether a signal is present at all — any strength from 1 to 15 turns it fully on; 0 turns it off. Because it gives instant visual feedback, the lamp is the classic “is my circuit working?” output.
It produces light level 15 when lit, the same brightness as a torch, making it useful for switchable lighting as well as a logic indicator.
How do you power a lamp?
Any source works: a lever or button beside it, dust running into it, a torch, a repeater, or a powered block adjacent to it. A lamp can be powered from any side and even from a block touching it. Wire several lamps off one signal and they all light together — or stagger them through repeaters to make a chasing light effect.
Key facts
- Turns on with any signal strength
1–15; off only at0. - Emits light level 15 when lit — as bright as a torch or glowstone.
- Can be powered from any adjacent side or by a powered block touching it.
- Is itself a solid block, so it can be part of structures and even pushed by pistons.
- Great as a debugging readout: place one at a circuit's output to see its state at a glance.
Bedrock note: turn-off delay
In Bedrock Edition a redstone lamp lights instantly but takes 6 game ticks (0.3 seconds) to turn off after power is removed — a little longer than Java's 4 game ticks (0.2s). For decorative lighting this is invisible, but in very fast flashing circuits the lamp may appear to stay lit a touch longer than the signal driving it. This simulator reflects the lamp's instant on and lagged off.