Yellow light - Revision history

Phol ende wodan: update to 5.0.0, resolve upcoming note, add old behavior to history section, also I noticed unnethack's info was wrong so I fixed that

2026-06-18T23:50:57Z

update to 5.0.0, resolve upcoming note, add old behavior to history section, also I noticed unnethack's info was wrong so I fixed that

Umbire the Phantom: tweaks

2026-05-18T23:28:02Z

tweaks

Quietust: /* Generation */ fix typo

2026-03-16T19:14:45Z

‎Generation: fix typo

Umbire the Phantom: touch-ups

2026-03-02T22:35:22Z

touch-ups

Umbire the Phantom: /* History */ copyedit

2026-03-02T19:45:36Z

‎History: copyedit

ScienceBall: /* Strategy */ restore missing word

2024-05-29T17:44:22Z

‎Strategy: restore missing word

Umbire the Phantom: no longer true

2024-05-29T17:28:51Z

no longer true

Umbire the Phantom: copyedit

2024-05-29T17:25:38Z

copyedit

Umbire the Phantom: formatting pass to match black light article

2023-07-04T08:37:59Z

formatting pass to match black light article

Umbire the Phantom: /* Generation */ Upcoming

2021-12-22T20:08:44Z

‎Generation: Upcoming

@@ Line 25: / Line 25: @@
 Randomly-generated yellow lights are always hostile.
-[[Reading]] a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocided]].
+In addition to normal random generation, [[read]]ing a cursed [[scroll of light]] while confused generates several [[tame]] [[cancelled]] yellow lights, unless they are [[genocide]]d. There will be 3-4 yellow lights created if the scroll is uncursed, and 5-6 if it is blessed.
 The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].
 ==Strategy==
@@ Line 40: / Line 36: @@
 ==History==
 The yellow light first appears in Hack 1.21 and Hack for PDP-11, which are both based on [[Jay Fenlason's Hack]], and is part of the initial bestiary for [[Hack 1.0]].
 ==Messages==
@@ Line 47: / Line 45: @@
 ==Variants==
 ===UnNetHack===
-In [[UnNetHack]], reading a non-cursed scroll of light while confused will instead summon multiple [[tame]] [[cancelled]] yellow lights if they are not genocided. An uncursed scroll will summon 3–4 yellow lights, while a blessed scroll will summon 5–6 yellow lights.
+In [[UnNetHack]], reading a non-cursed scroll of light while confused will instead summon 1-15 hostile yellow lights if they are not genocided.
 ===xNetHack===
@@ Line 61: / Line 59: @@
 ==References==
 <references/>
-{{nethack-367}}
+{{nethack-500}}
 [[Category:Monsters]]

@@ Line 34: / Line 34: @@
 ==Strategy==
-While it is possible to kill yellow lights normally for characters that can deal with their 0 [[AC]] and fast, erratic movement, it is usually preferable to let them explode while the character is already blinded: a [[blindfold]] or [[towel]] is one of the most straightforward methods of making yellow lights harmless, and a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make them trivial to deal with. Yellow lights also cannot see invisible - if their target is [[invisible]] or has [[displacement]], they may harmlessly explode at the square that the light perceives them to be at.
+While it is possible to kill yellow lights normally for characters that can deal with their 0 [[AC]] and fast, erratic movement, it is usually preferable to let them explode while the character is already blinded: a [[blindfold]] or [[towel]] is one of the most straightforward methods of making yellow lights harmless, and a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make them trivial to deal with. Yellow lights also cannot see invisible&mdash;if their target is [[invisible]] or has [[Displacement (property)|displacement]], the light may harmlessly explode at the square they perceive the target to be at.
-Be careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s - a light that explodes close to the room will wake many (if not all) of the inhabitants.
+Be careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s, as a light that explodes anywhere close to the room will wake many (if not all) of the inhabitants.
 ==History==

@@ Line 25: / Line 25: @@
 Randomly-generated yellow lights are always hostile.
-[[Reading]] a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocided]]d.
+[[Reading]] a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocided]].
 The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].

@@ Line 18: / Line 18: @@
   |reference=[[monst.c#line956]]
 }}
 A '''yellow light''', {{monsym|yellow light}}, is a type of monster that appears in ''[[NetHack]]''. The yellow light is the only other member of the [[Light (monster class)|light]] [[monster class]] along with the [[black light]]. It is [[amorphous]], can [[fly]] and flow under [[door]]s, and act as a 3x3 [[light]] source.
-A yellow light has an [[explosion]] attack directed at a target monster's square that destroys the yellow light, wakes nearby [[sleeping]] monsters and [[blind]]s any monster hit for 10d20 turns. The attack is ineffective on targets that cannot see, and if the yellow light is invisible and a character cannot [[see invisible]], there is an [[experience level]]-based chance that its explosion will have no effect.{{refsrc|src/mhitu.c|2100|version=NetHack 3.6.7}} A yellow light possesses every resistance [[property]] minus [[magic resistance]].
+A yellow light has an [[explosion attack]] directed at a target's square that destroys the yellow light, wakes nearby [[sleeping]] monsters and [[blind]]s any monster hit for 10d20 turns. The attack is ineffective on targets that cannot see, and if the yellow light is invisible and a [[hero]] targeted by the attack cannot [[see invisible]], there is an [[experience level]]-based chance that its explosion will have no effect.{{refsrc|src/mhitu.c|2100|version=NetHack 3.6.7}} A yellow light possesses every resistance [[property]] minus [[magic resistance]].
 ==Generation==
 Randomly-generated yellow lights are always hostile.
-In addition to normal random generation, [[read]]ing a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocide]]d.
+[[Reading]] a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocided]]d.
 The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].

@@ Line 40: / Line 40: @@
 ==History==
-Yellow lights have been present since Hack121, a variant of [[Jay Fenlason's Hack]].
+The yellow light first appears in Hack 1.21 and Hack for PDP-11, which are both based on [[Jay Fenlason's Hack]], and is part of the initial bestiary for [[Hack 1.0]].
 ==Messages==

@@ Line 15: / Line 15: @@
   |resistances=fire, cold, shock, disintegration, sleep, poison, acid, stoning
   |resistances conveyed=None
-  |attributes={{attributes|A yellow light|
+  |attributes={{attributes|A yellow light|nocorpse=1|fly=1|breathless=1|amorphous=1|noeyes=1|nolimbs=1|nohead=1|mindless=1|unsolid=1|notake=1|hostile=1|neuter=1|infravisible=1|light=1}}
   |reference=[[monst.c#line956]]
 }}
-A '''yellow light''', {{monsym|yellow light}}, is a type of monster that appears in ''[[NetHack]]''. It is the only other member of the [[Light (monster class)|light]] [[monster class]] along with the [[black light]]. A yellow light is [[amorphous]], can [[fly]] and flow under [[door]]s, and possesses every resistance [[property]] minus [[magic resistance]].
+A '''yellow light''', {{monsym|yellow light}}, is a type of monster that appears in ''[[NetHack]]''. The yellow light is the only other member of the [[Light (monster class)|light]] [[monster class]] along with the [[black light]]. It is [[amorphous]], can [[fly]] and flow under [[door]]s, and act as a 3x3 [[light]] source.
-Yellow lights [[Light|illuminate]] their surroundings in a 3x3 area centered on themselves. Their sole attack directs an [[explosion]] at the square of its target that destroys the yellow light - any target that is hit is [[blind]]ed for 10d20 turns. The attack is much less effective on [[you]] if you cannot see the yellow light - if a yellow light is invisible and you cannot [[see invisible]], there is an [[experience level]]-based chance that its explosion will not affect you.{{refsrc|src/mhitu.c|2100|version=NetHack 3.6.7}} A yellow light's explosion will wake nearby [[sleeping]] monsters.
+A yellow light has an [[explosion]] attack directed at a target monster's square that destroys the yellow light, wakes nearby [[sleeping]] monsters and [[blind]]s any monster hit for 10d20 turns. The attack is ineffective on targets that cannot see, and if the yellow light is invisible and a character cannot [[see invisible]], there is an [[experience level]]-based chance that its explosion will have no effect.{{refsrc|src/mhitu.c|2100|version=NetHack 3.6.7}} A yellow light possesses every resistance [[property]] minus [[magic resistance]].
 ==Generation==
-Yellow lights are always generated hostile, and [[Corpseless|never leave a corpse]] upon death.
+Randomly-generated yellow lights are always hostile.
-In addition to normal random generation, [[read]]ing a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a black light unless they are [[genocide]]d.
+In addition to normal random generation, [[read]]ing a non-[[cursed]] [[scroll of light]] while confused has a {{frac|5}} chance of generating a yellow light unless they are [[genocide]]d.
 The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].
-{{upcoming|NetHack 3.7.0|Reading a non-cursed scroll of light while confused will instead summon multiple [[tame]] [[cancelled]] yellow lights if they are not genocided. An uncursed scroll will summon 3–4 yellow lights, while a blessed scroll will summon 5–6 yellow lights. This was adapted from UnNetHack.}}
+Yellow lights [[Corpseless|never leave a corpse]] upon death.
 ==Strategy==
-Blinding yourself, e.g. by wearing a [[blindfold]] or [[towel]], will render the explosion harmless; various cures such as a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make them trivial to deal with. Yellow lights also cannot see invisible - if you are [[invisible]] or have [[displacement]], they may explode at an empty square with no effect.
+While it is possible to kill yellow lights normally for characters that can deal with their 0 [[AC]] and fast, erratic movement, it is usually preferable to let them explode while the character is already blinded: a [[blindfold]] or [[towel]] is one of the most straightforward methods of making yellow lights harmless, and a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make them trivial to deal with. Yellow lights also cannot see invisible - if their target is [[invisible]] or has [[displacement]], they may harmlessly explode at the square that the light perceives them to be at.
-While it is possible to kill yellow lights normally if you can deal with their 0 AC and fast, erratic movement, it is usually preferable to let them explode while already blinded as above in most scenarios. Be careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s - a light that explodes close to the room will wake many (if not all) of the inhabitants.
+careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s - a light that explodes close to the room will wake many (if not all) of the inhabitants.
 ==History==

@@ Line 9: / Line 9: @@
   |frequency=4
   |genocidable=Yes
-  |attacks=Explode [[blindness|blind]]
+  |attacks=Explode 10d20 [[blindness|blind]]
   |weight=0
   |nutr=0
@@ Line 21: / Line 21: @@
 }}
-A '''yellow light''', {{monsym|yellow light}}, is a type of monster that appears in ''[[NetHack]]''. As an [[amorphous]] monster made of energy, it can flow under doors.
+A '''yellow light''', {{monsym|yellow light}}, is a type of monster that appears in ''[[NetHack]]''. It is the only other member of the [[Light (monster class)|light]] [[monster class]] along with the [[black light]]. A yellow light is [[amorphous]], can [[fly]] and flow under [[door]]s, and possesses every resistance [[property]] minus [[magic resistance]].
-Its sole means of attacking is to [[Explosion attack|explode]] towards its target - this destroys itself, [[blind]]s the target for 10d20 turns, and wakes nearby sleeping monsters. The attack is much less effective if you cannot see the yellow light - if it is invisible and you do not [[see invisible]], there is a chance based on your level that it will not affect you.{{refsrc|mhitu.c|2098|version=NetHack 3.6.6}}
+Yellow lights [[Light|illuminate]] their surroundings in a 3x3 area centered on themselves. Their sole attack directs an [[explosion]] at the square of its target that destroys the yellow light - any target that is hit is [[blind]]ed for 10d20 turns. The attack is much less effective on [[you]] if you cannot see the yellow light - if a yellow light is invisible and you cannot [[see invisible]], there is an [[experience level]]-based chance that its explosion will not affect you.{{refsrc|src/mhitu.c|2100|version=NetHack 3.6.7}} A yellow light's explosion will wake nearby [[sleeping]] monsters.
 ==Generation==
-In addition to normal random generation, if yellow lights are not [[genocide]]d, reading a [[beatitude|noncursed]] [[scroll of light]] while [[confused]] has a {{frac|5}} of summoning a yellow light instead of the standard confused effect.
+Yellow lights are always generated hostile, and [[Corpseless|never leave a corpse]] upon death.
 The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].
-{{upcoming|NetHack 3.7.0|Reading a noncursed scroll of light while confused will instead summon multiple [[tame]] [[cancelled]] yellow lights if they are not genocided. An uncursed scroll will summon 3–4 {{monsymlink|yellow light}}s, while a blessed scroll will summon 5–6 yellow lights.}}
+{{upcoming|NetHack 3.7.0|Reading a non-cursed scroll of light while confused will instead summon multiple [[tame]] [[cancelled]] yellow lights if they are not genocided. An uncursed scroll will summon 3–4 yellow lights, while a blessed scroll will summon 5–6 yellow lights. This was adapted from UnNetHack.}}
 ==Strategy==
-Blinding yourself, e.g. by wearing a [[blindfold]] or [[towel]], will render the explosion harmless; a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make this trivial to deal with. Yellow lights also cannot see invisible - if you are [[invisible]] or [[displaced]], they may explode at an empty square with no effect.
+Blinding yourself, e.g. by wearing a [[blindfold]] or [[towel]], will render the explosion harmless; various cures such as a [[unicorn horn]] or curative spell (e.g., {{spell of|extra healing}} and {{spell of|cure blindness}}) also make them trivial to deal with. Yellow lights also cannot see invisible - if you are [[invisible]] or have [[displacement]], they may explode at an empty square with no effect.
-While it is possible to kill yellow lights normally if you can deal with their 0 AC and fast, erratic movement, it is usually preferable to let them explode while already blinded with the exception of specific scenarios. On that note, be careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s - a light that explodes close to the room will wake many (if not all) of the inhabitants.
+While it is possible to kill yellow lights normally if you can deal with their 0 AC and fast, erratic movement, it is usually preferable to let them explode while already blinded as above in most scenarios. Be careful of dealing with yellow lights in or around rooms such as [[treasure zoo]]s or [[throne room]]s - a light that explodes close to the room will wake many (if not all) of the inhabitants.
 ==History==
-Yellow lights have been present in the game since [[Hack121]], a variant of Jay Fenlason's Hack.
+Yellow lights have been present since Hack121, a variant of [[Jay Fenlason's Hack]].
 ==Messages==
@@ Line 47: / Line 49: @@
 ===UnNetHack===
 In [[UnNetHack]], yellow lights are subject to special generation on [[the Oracle]] level, where only 93% of monsters are generated through normal means; of the remaining 7%, yellow lights have a {{frac|10}} chance of being generated.
 ==Encyclopedia entry==
@@ Line 57: / Line 64: @@
 ==References==
 <references/>
-{{nethack-366}}
+{{nethack-367}}
 [[Category:Monsters]]

← Older revision		Revision as of 20:08, 22 December 2021
Line 29:		Line 29:

	The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].		The second variant of [[Medusa's Island]] has a yellow light in the back room of the hall [[Medusa]] inhabits, and three yellow lights are generated on the [[Plane of Air]].
		+
		+	{{upcoming\|NetHack 3.7.0\|Reading a noncursed scroll of light while confused will instead summon multiple [[tame]] [[cancelled]] yellow lights if they are not genocided. An uncursed scroll will summon 3–4 {{monsymlink\|yellow light}}s, while a blessed scroll will summon 5–6 yellow lights.}}

	==Strategy==		==Strategy==