REDSTONE LAMP
A light source that turns on when powered by redstone. Emits light level 15 when on, 0 when off. Has a slight delay when turning off (2 redstone ticks).
Crafting Recipe
4 Redstone Dust + 1 Glowstone → 1 Redstone Lamp
Signal Behavior
Input
InputAny redstone signal
Output
OutputLight level 15 when powered
Max Signal Strength
Max Signal Strength0
Delay
DelayInstant on, 2 redstone ticks to turn off
Modes
- On (powered)
- Off (unpowered)
Overview: what the Redstone Lamp is and does
A light source that turns on when powered by redstone. Emits light level 15 when on, 0 when off. Has a slight delay when turning off (2 redstone ticks).
As a mechanical component it converts a redstone signal into physical action rather than passing the signal onward. It is the standard controllable light, used for runway strips, status boards, and pixel displays.
The Redstone Lamp was added to Minecraft in 1.2.1 and everything described here reflects its behaviour in Java Edition 1.21.
How it works: the redstone mechanics
On the input side, any redstone signal. On the output side, light level 15 when powered.
Power it from any side and it lights to level 15 instantly. When power is removed it stays lit for 2 redstone ticks before going dark. It can be lit by an adjacent powered solid block, not just by dust, which makes wall-of-lamps displays compact.
Timing-wise, factor in instant on, 2 redstone ticks to turn off when you wire it into a sequenced circuit.
It produces no redstone output signal of its own — its result is the physical action it performs, so you read its effect in the world rather than off a wire.
It operates in the following modes: on (powered) and off (unpowered).
How to set it up
- 1Craft the Redstone Lamp: 4 Redstone Dust + 1 Glowstone → 1 Redstone Lamp.
- 2Decide where the signal needs to start or land, then place the Redstone Lamp against a solid surface so it can act on the blocks in front of it.
- 3Feed it a redstone pulse or signal from a lever, button, or circuit; it will perform its action and ignore further power until the input changes.
- 4Test in a creative-mode plot first: trigger the input and confirm the Redstone Lamp behaves exactly as the timing above predicts before committing it to a survival build.
Uses & applications
- ▸Automatic lighting
- ▸Display boards
- ▸Status indicators
- ▸Runway lights
- ▸Binary displays
Tips & common mistakes
- !2-tick delay when turning off can affect fast circuits
- !Can be powered by adjacent powered blocks
- !That 2-tick off delay matters in fast displays — a lamp will appear to lag one frame behind the signal driving it.
Redstone Lamp FAQ
What is the Redstone Lamp used for in Minecraft redstone?
The Redstone Lamp is most often used for automatic lighting, display boards, status indicators, and runway lights. As a mechanical component it converts a redstone signal into physical action rather than passing the signal onward.
What signal strength does the Redstone Lamp output?
The Redstone Lamp does not output a redstone signal of its own; its result is light level 15 when powered. Its purpose is physical action, not signal generation.
How do you craft the Redstone Lamp?
4 Redstone Dust + 1 Glowstone → 1 Redstone Lamp. It was introduced in 1.2.1.
Does the Redstone Lamp add any delay to a circuit?
Yes — instant on, 2 redstone ticks to turn off. Account for that timing when chaining it with other components, especially in clocks and fast doors.