Redstone lamp

Summary

• 1 Obtaining
  • 1.1 Manufacturing
• 2 Operation
• 3 Uses
• 4 Data values
  • 4.1 ID
• 5 History
  • 5.1 Flashlights
• 6 Curiosities
• 7
• 8

Obtaining

A redstone lamp can be removed by hand or with any tool, and dropped as an item.

Manufacturing

Operation

The behavior of a Redstone lamp is the same as for any solid opaque block:

• It is opaque, so it blocks any light that tries to pass through it.
• Allows you to place adjacent blocks (torches, levers, buttons, pumpkins, etc.).
• Creates a redstone connection when redstone powder is placed on top of or next to the lamp block.
• It cuts the redstone connection (and therefore also the current through them) of two redstone powders, one on top of a block and the other next to said block, when the redstone lamp is placed on top of the lower powder.
• It is weakly activated when placed adjacent to activated redstone dust, spreading current to redstone components but not redstone dust.
• It is strongly activated when connected to a redstone current source or any current-carrying component (other than redstone dust), propagating current to both components and dust.
• When placed next to an activated opaque block (including other redstone lamps), the lamp will activate (light up), but have no current (so it will not energize or activate adjacent powders or components).
• Exception: Despite being an opaque block, an activated redstone lamp allows natural light to pass through it (but diffused, reducing its light level by 1 point). Since the light emitted by the lamp will always be greater than the diffused natural light, this effect can only be appreciated through the debug screen F3.

A redstone lamp turns on normally, but takes 2 ticks to turn off. However, this delay does not apply to any object that is receiving current through the lamp (that is, this cannot be used to add delay ticks to a signal as if it were a repeater).

Uses

Redstone lamps can be used as an attractive and functional light source. If the lamps are connected to a switch, care should be taken when leaving the room with the lights off, as monsters are likely to appear in the darkened room. This can be used to the advantage of the player; In a trap based on a Monster Generator, for example, redstone lamps can be activated to increase the light level and prevent monsters from spawning. Similarly, they can be used to allow the growth of giant mushrooms.

Redstone lamps can also be used to create a screen, as an alternative to using redstone torches, which do not emit much light. When creating a screen in this way, it should be noted that each "pixel" is a small crossover, which makes it impossible to create straight lines. This can be corrected by creating a screen two blocks deep. When activating the blocks from the opposite side, only one active lamp will be seen, and not 5 as in the first case.

A system of redstone lamps connected to a daylight sensor with an inverted signal can be used to automatically illuminate a building or structure at night. A redstone clock can also be used, as long as it is synchronized with the proper light levels.

Since hostile creatures can appear on unlit lamps, a creature-killing system can be made that allows the player to control when to turn on the lights and when to turn them off. A line of repeaters can also be placed next to lamps to create a timed light.

Redstone lamps can also be used to create a mushroom farm, as the mushrooms fall when the light level becomes high enough.

Data values

ID

Java Edition:

Bedrock Edition:

History

Torches

Before redstone lamps, Notch wanted to implement an element called "The Lamp", but the idea was scrapped and only later resurfaced as the redstone lamp; however, there are several differences between the two.

With the addition of the flashlight, the torches would go out and should be re-lit with a lighter. The flashlight would serve as a permanent source of light. According to Notch, when the update would occur, all torches placed on the map, in inventory, and in chests before the update would turn into lanterns. To do this, the flashlights would use the (old) torch ID.

The glowstone added in the Halloween Update was a potential requirement for making lanterns, as it has the highest luminance as a raw material. This would also make flashlights relatively inaccessible and a risky item to obtain, as has been hinted at by Notch. A potential second block that might have been required to create lanterns was the Infied, a block that never turns off while on. Glowstone Dust can be obtained by trading it with villagers, and it can also be obtained by going to Hell, along with Hell.

Curiosities

• At the "Notch's Ludum Dare 22" contest entry, Minicraft, lanterns could be made on a workbench. [1]
• If you set the redstone lamp on a timer so it turns on and off and you shoot an arrow at the top or side, the arrow will vibrate while making the sound of the arrow sticking to a block.
• Although a glass sound (such as the glow stone, the glass panel, or the glass itself) is reproduced when breaking, it acts as a solid block.
• If you place a redstone torch next to a lamp, rather than on it, it will give it energy.
• Pressure plates, buttons and levers can be placed on top of or next to the redstone lamp, giving them power.
• Unlike redstone torches, rapidly turning lamps on and off will not burn them out.
• Just like TNT, you can have a block above a redstone lamp, and a pressure plate on that, and the lamp will light if the plate is stepped on. This can be an effective warning method.
• Placing one unlit redstone lamp anywhere beside a lit redstone lamp, that is powered directly, will cause the unlit redstone lamp to become lit. (This only happens because the redstone lamp transmits power to the second one.)
• Redstone lamps can be powered by detector rails, making them an interesting material to use for rollercoasters and lighthouses.
• Placing an on-state redstone lamp will cause it to deactivate due to the lack of redstone powering the lamp.
• En la edición Xbox 360, it is possible to make an RS NOR latch with a redstone lamp. Whether or not this is a bug is currently unknown. First, place the redstone lamp and place two redstone dust connecting to it. Then, on the opposite side of the dust, place a repeater directing into the lamp and connect it to a redstone torch. Then, destroy the repeater. The lamp should still be on, along with the wiring from the lamp.

• 

  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 are themselves solid blocks, and so 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.

1. ↑ https://s3.amazonaws.com/ld48/ld22/index.html - Minicraft game made by Notch for Ludum Dare 22.

Redstone

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