Redstone Lamp

Redstone Lamp

Transparent	Partial (when lit)
Luminance	Yes, 15 (when lit)
Blast resistance	1.5
Tool	Any tool
Renewable	Yes
Stackable	Yes (64)
Flammable	No
Drops	Itself
Data values	See § Data values
Namespaced ID	See § Data values

	“	Redstone lamps came to Minecraft in 2012 in update 1.2.1 - which also added iron golems, ocelots, chiseled stone bricks and jungle biomes. They give off a light level of 15 - the same as fire and glowstone - but only when powered by redstone. In fact, that’s how they’re made - by surrounding a glowstone block with four lumps of redstone dust in a crafting table.	„
		— Duncan Geere

A redstone lamp is a block which produces light when activated with a redstone signal.

Obtaining

A redstone lamp can be mined by hand or with any tool, dropping itself as an item.

Block	Redstone Lamp
Hardness	0.3
Breaking time
Hand	0.45

Crafting

Ingredients	Crafting recipe
Redstone Dust + Glowstone

Usage

A redstone lamp can be used to produce switchable light.

Redstone lamps are redstone mechanisms and can be activated by:

• An adjacent active power component, including above or below: for example, a redstone torch (except that a redstone torch will not activate a redstone lamp it is attached to), a block of redstone, a daylight sensor, etc.
• An adjacent powered block (for example, an opaque block with an active redstone torch under it), including above or below
• A powered redstone comparator or redstone repeater facing the redstone lamp
• Adjacent powered redstone dust configured to point at the redstone lamp (or on top of it) or directionless; a redstone lamp is not activated by adjacent powered redstone dust that is configured to point away from it.

A redstone lamp activates instantly, but takes 2 redstone ticks to turn off (4 game ticks, or 0.2 seconds barring lag).

An active redstone lamp produces block light 15. An inactive redstone lamp produces no light.

Although a redstone lamp acts like an opaque block in most ways (torches and levers can be attached to it, redstone dust can be placed on it, etc.), an active redstone lamp is "transparent" to sky light, reducing the sky light level by 1.

Data values

ID

Java Edition:

Block	Namespaced ID
Redstone Lamp	redstone_lamp

Bedrock Edition:

Block	Namespaced ID	Numeric ID
Redstone Lamp	redstone_lamp	123
Lit Redstone Lamp	lit_redstone_lamp	124

Block states

See also: Block states

Java Edition:

Name	Default value	Allowed values	Description
lit	false	false true	If the redstone lamp is lit.

History

Java Edition Alpha
November 11, 2010					Notch claimed that "lamps" had actually stood for "Light A-givin' Material Portal Side... the yellow stone thing"
Java Edition
1.2.1		12w07a			Added redstone lamps.
		1.2-pre			Darkened texture for inactive redstone lamp.
1.2.4					Added 2-tick delay to deactivation.
1.3.1		12w22a			Inventory sprites for blocks were flipped from left to right, changing to .
1.7.2		13w37a			The item form of block ID 124 (lit redstone lamp) was removed from the game. It can no longer exist in inventories, only as a block in the world.
January 11, 2018					Jasper Boerstra tweets an image of updated redstone lamp textures.
1.13		17w47a			The different block IDs for the redstone lamp got merged into one ID.
					Added lit block state.
					Prior to The Flattening, these blocks' numeral IDs were 123 and 124.
1.14		18w43a			Changed the texture of redstone lamps.
Pocket Edition Alpha
0.13.0		build 1			Added redstone lamps.
Bedrock Edition
1.10.0		beta 1.10.0.3			Changed the texture of redstone lamps.
Legacy Console Edition
TU12	CU1	1.0	Patch 1		Added redstone lamps.
New Nintendo 3DS Edition
0.1.0					Added redstone lamps.

Issues

Issues relating to "Redstone Lamp" are maintained on the bug tracker. Report issues there.

Trivia

• Multiple tiled redstone lamps produce a pattern which closely resembles the truncated square tiling t{4,4}.
• Redstone lamps are transparent on maps.

Gallery

• 

  A redstone lamp shown during the day that is switched off.

• 

  A redstone lamp shown during the day that is switched on.

• 

  A redstone lamp shown during the evening that is switched off.

• 

  A redstone lamp shown during the evening that is switched on.

• 

  Demonstrating how wire powers redstone lamps.

• 

  Demonstrating how repeaters power redstone lamps.

• 

  Demonstrating how a solid block powers redstone lamps.

Note that lamps themselves are solid blocks, so they power other lamps. This causes the cross-shaped patterns that you see.

• 

  Floor torch with no lamp above it.

• 

  Floor torch with a lamp above it.

• 

  Wall torch with no lamp above it.

• 

  Wall torch with a lamp above it.

A glowing roof is easy to do - just lay wire across the blocks, or line the top of the lamps with redstone blocks. Floors and walls are also do-able. For a floor, just use the "knight's move" shape underneath the floor with torches. For a wall, use wall-mounted torches that power blocks above them.

• 

  A redstone lamp floor.

• 

  A redstone lamp wall.

References

Redstone

View at: Template:Redstone/content [edit]

Blocks

View at: Template:Blocks/content [edit]