Light sources

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Light sources cast light over a number of squares. To light any light source, use the apply command, a.

Lit areas can be diplayed in brighter characters using the game option lit_corridor.

Table of light sources

Light sources are generated to stay lit for the number of turns in the table below. They are generated in the quantity and BUC state shown. Cursed light sources will sometimes not light.

Light source Turns Generated
tallow candle 200 1 to 7; 10% blessed, 80% uncursed, 10% cursed
wax candle 400 1 to 7; 10% blessed, 80% uncursed, 10% cursed
brass lantern 1000 to 1499 10% blessed, 80% uncursed, 10% cursed
oil lamp 1000 to 1499 10% blessed, 80% uncursed, 10% cursed
potion of oil 400 12.5% blessed, 75% uncursed, 12.5% cursed
magic lamp Infinite 25% blessed, 50% uncursed, 25% cursed
Sunsword Infinite 10% blessed, 80% uncursed, 10% cursed
Candelabrum of Invocation See below Unique item


The Candelabrum

Candles can be applied to the Candelabrum of Invocation. The Candelabrum acts like an ordinary light source if at least one candle is applied to it. It will burn as many turns as the shortest-lived[1] candle attached to it. However, each time you light it anywhere other than on the vibrating square, the remaining life will immediately be cut in half[2] ("The candles are being rapidly consumed!"). The Candelabrum will not light if cursed.

Light radius 4:

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Lanterns and lamps

( Lamp.png
Name oil lamp
Appearance lamp
Base price 10 zm
Weight 20
Material copper
Monster use Will not be used by monsters.
( Brass lantern.png
Name brass lantern
Appearance brass lantern
Base price 20 zm
Weight 30
Material copper
Monster use Will not be used by monsters.

Brass lanterns and oil lamps can be refilled by charging them; blessed charging will refill them to 1500 turns, and uncursed charging will add 750 turns to a maximum of 1500. An oil lamp with 1000 or fewer turns left can also be refilled by #dipping it into a potion of oil, getting twice the remaining turns left in the potion. (Attempting to refill an oil lamp with a lit potion of oil, or while the lamp is lit, will cause an explosion dealing 6d6 points of damage). No lamp can be filled beyond 1500 turns.

Light radius 3:

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Magic lamps

( Lamp.png
Name magic lamp
Appearance lamp
Base price 50 zm
Weight 20
Material copper
Monster use Will not be used by monsters.
Main article: Magic lamp

Magic lamps never run out of power, and may summon a djinni and lead to a wish when #rubbed.

Sunsword

Light radius: 2

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The artifact weapon Sunsword will act as a light source whenever wielded, either by you or by a monster.

Candles

( Candle.png
Name tallow candle
Appearance candle
Base price 10 zm
Weight 2
Material wax
Monster use Will not be used by monsters.
( Candle.png
Name wax candle
Appearance candle
Base price 20 zm
Weight 2
Material wax
Monster use Will not be used by monsters.

The only differences between wax and tallow candles are their lifespans, value, and that eating tallow candles breaks vegetarian conduct. You can mix different candle types on the Candelabrum, though it will burn only as long as the shortest-lived type.

Candles can be randomly generated or wished for, but some can nearly always be found in Izchak's lighting shop in Minetown, and as of version 3.6.0 the items guaranteed to appear in Vlad's Tower include two stacks of candles. Wishing for candles guarantees at least seven (the number needed on the Candelabrum).

Light radius 2:

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Candles hold a special place in the game, as seven of them are needed for the invocation ritual. They must be attached to the Candelabrum of Invocation prior to beginning the ritual proper, although they may be partially burnt prior to this, and you may freely mix wax and tallow, blessed, uncursed, and cursed candles.

Seven candles are the only non-unique items that are required to win the game, but in versions of NetHack prior to 3.6.0 (and some variants based on versions prior to 3.6.0) they were not guaranteed to appear at any point in the Mazes of Menace. Izchak's Lighting Shop was guaranteed, but it was not guaranteed to have the requisite seven. It was therefore possible not to find enough randomly generated candles to perform the invocation, and players had to resort to polypiling tools, using a wish (a wish will always produce up to seven candles, in an exception to the ordinary mechanics of wishing for multiple items), and less-savory techniques such as pudding farming.

As of 3.6.0, the top level of Vlad's Tower now contains two stacks of 4-8 wax and tallow candles, so unless these are destroyed, any player is able to find a minimum of eight candles without violating any conducts.

A single candle has a light radius of 2, the radius increases by one for every additional power of 7. Therefore, a stack of 7 candles lights up a 3 square radius, 49 a 4 square radius, 343 a 5 square radius and so forth[3].

Monster light sources

Currently all monsters that emit light create a light of radius 1 around themselves. Light-emitting monsters[4] are y yellow light, y black light, e flaming sphere, e shocking sphere, v fire vortex and E fire elemental.

In the following chart, @ is the light-emitting monster and x is the area lit by it.

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Encyclopedia

Brass lantern

While pretending to be a fancy safety lamp, it is in fact
battery powered. A discreet little switch is marked "on/off"
in elaborate lettering.

[ Adventure 770, by Mike Arnautov ]

Lamp

The entry is the same for both oil and magic lamps:

When he came to himself he told his mother what had passed,
and showed her the lamp and the fruits he had gathered in the
garden, which were in reality precious stones. He then asked
for some food.

"Alas! child," she said, "I have nothing in the house, but I
have spun a little cotton and will go and sell it."

Aladdin bade her keep her cotton, for he would sell the lamp
instead. As it was very dirty she began to rub it, that it
might fetch a higher price. Instantly a hideous genie
appeared, and asked what she would have. She fainted away,
but Aladdin, snatching the lamp, said boldly:
"Fetch me something to eat!"

[ Aladdin, from The Arabian Nights, by Andrew Lang ]

Candle

The entry is the same for both tallow and wax candles, as well as the Candelabrum of Invocation:

Faustus: Come on Mephistopheles. What shall we do?
Mephistopheles: Nay, I know not. We shall be cursed with bell,
book, and candle.
Faustus: How? Bell, book, and candle, candle, book, and bell,
Forward and backward, to curse Faustus to hell.
Anon you shall hear a hog grunt, a calf bleat, and an ass bray,
Because it is Saint Peter's holy day.
(Enter all the Friars to sing the dirge)

[ Doctor Faustus and Other Plays, by Christopher Marlowe ]

SLASH'EM

SLASH'EM adds new light emitting monsters, and modifies some existing monsters to have larger light radii. All lights and fire vortices have a light radius of 3. Fire elementals and fire vampires have a light radius of 2. Flaming and shocking spheres and wax golems have a light radius of 1.

Wax golems drop wax candles when destroyed, making candles more common.

Magic candles, candles that aren't consumed when used, are also added in SLASH'EM.

See also

References

This page is based on a spoiler by Dylan O'Donnell. The original license is:

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