Difference between revisions of "Sun lamp"

Latest revision as of 00:17, 5 May 2024

Acquisition[edit]

Sun lamps can be constructed once the electricity research project has been completed. Each requires 40 Steel and 330 ticks (5.5 secs) of work modified by the construction speed of the builder.

Summary[edit]

Radius of light sufficient to grow. Displayed radius shown in sterile tile, tiles where plants can be grown outside of the radius shown in gold tile

A sun lamp consumes 2900 W of power from 06:00 to 19:12, the period where plants can grow. While online, it provides 100% light within a 6.5-tile radius. This provides 120 tiles with sufficient light to grow. Note that this is not reflected by the radius displayed when constructing a sun lamp, and following the displayed radius would result in 100 growable tiles, ignoring 20 tiles that could otherwise be used.

This allows crops like rice plants to grow in a roofed room. As the natural sun doesn't always provide 100% light at day, a sun lamp causes plants to grow somewhat faster. They also provide at least 30% light in a 13-tile radius, which is enough to prevent penalties for being in darkness.

Due to RimWorld's temperature mechanics, an enclosed room with a mostly complete roof is required to actually heat or cool an area. Lamps themselves give a marginal amount of heat, 3 heat per second.

Rain or snow on a powered sun lamp will cause short circuits and fires. A roof will prevent this.

Analysis[edit]

A sun lamp's main purpose is to create growing zones indoors, often called greenhouses. This allows plants to grow in the winter, when used with a heater. In extremely hot biomes, you might need coolers to grow during in the summer. Even in an "year-round" growing season, unpredictable events such as toxic fallout and volcanic winters can disrupt plant growth. Double-width walls provide more insulation against temperature changes, and potentially save on heater/cooler costs.

Solar flares will cut the power, so prepare a shelf with emergency wood to build campfires to keep the room temperature above -10 °C (14 °F) (below which most plants will rapidly die).

As they cannot be grown under roofs, trees such as pine, birch, saguaro or cocoa trees may not be grown in completely closed greenhouses. They may only be grown in greenhouses with roofs open in a grid pattern, and those leak a lot of temperature-controlled air. As these roofs will let in sufficient natural sunlight in most biomes, there is no need to place a sun lamp inside tree greenhouses.

Power[edit]

If you have biofuel refineries available, you can use food produced by hydroponics to fuel chemfuel generators to help power the greenhouse array. This is so efficient that it violates thermodynamics, and leaves you with spare food for your colonists as well.

As sun lamps turn off at night, they consume an average of 1595 W⋅Days. Batteries can be used to average out power usage. However, batteries only take in energy at a 50% rate, effectively meaning double the power is required at night, for a required power generation of 2069 W⋅Days assuming 100% consistent power generation and a single battery with a passive loss of -5W⋅Days per day. As this only requires 463.1 W⋅Days of storage and a battery holds 600 W⋅Days, fewer batteries and infinitesimally less generation is needed when multiple sun lamps are supported.

Otherwise, 2^{[Verify/Detail]} solar generators are roughly enough to power a single sun lamp in equatorial regions, not counting any hydroponics basins.

Hydroponics[edit]

You can grow crops indoors with or without hydroponics basins. It is more cost effective to grow on soil, assuming you have soil available.

The 24 hydroponics basins would cost 2400 Steel, 24 Components for a total of 2.8 sun lamp's worth of growth. This does not count the extra 1680 W of power required for those basins.
You could instead make and power 2 more sun lamps. 4 solar generators are enough to power those lamps, and would only cost 400 Steel, 12 Components. Even when considering batteries, heaters, and the 80 for sun lamps themselves, making more sun lamps is more efficient than building hydroponics for 1.

If your only goal is to grow crops during the winter, then placing multiple sun lamps without hydroponics is more resource efficient than using hydroponics. However, the lamps would end up taking up more space. Therefore, hydroponics are best used when growing space is limited, like inside a mountain or in an ice sheet.

In the late game, hydroponics have a few advantages. Due to their reduced space, it takes less travel time, which makes work more efficient and defense easier. They take up less power per tile, too. When you have access to deep drills and fabrication, you can easily afford the steel and component cost.

Version history[edit]

0.17.1546 - Now turn themselves off when plants are resting.
1.2.2753 - Fix: Gloomlight would prevent a sun lamp from producing "brightly lit" cells within the radius of the Gloomlight. Due to: the glowColor of the Gloomlight not having an explicit alpha of zero. It now correctly ignores the alpha from the xml.
1.3.3117 - Fix: Sunlamp does not trigger blinding light for Darkness pawns.
1.5.4062 - Unreported change to sun lamp lit radius, increasing it, without increasing the displayed radius when constructing the lamp.

Pre-1.5 densest hydroponics set up.

Architect

Furniture: Animal bed • Animal sleeping box • Animal sleeping spot • Bedroll (Double) • Plant pot • Sculptures (Small, Large, Grand, Terror ) • Sleeping spot (Double, Baby ) • Stool • Table (1x2, 2x2, 2x4, 3x3) • Torch lamp • Urn • Wall torch lamp • Wall lamp • Animus stone • Darktorch • Fungus darktorch • Crib
Complex Furniture: Armchair • Bed (Double) • Bookcase (Small) • Couch • Dining chair • Dresser • End table • Royal bed • Shelf (Small) • Brazier (Darklight ) • Drape • Grand meditation throne • Meditation throne • Slab bed (Double) • Baby decoration • Blackboard • School desk • Toy box
(research): Flood light • Hospital bed • Standing lamp • Sun lamp • Bonsai pot

@@ Line 1: / Line 1: @@
-{{infobox main|furniture|
+{{Page Under Construction|reason=Recent unreported change to lit area. update still in progress}}
-|name = Sun lamp
+{{See also|Standing lamp}}
-|image = LampSun.png|Sun lamp
+{{Infobox main|furniture
-|description = Lights an area brightly enough to grow crops.
+| name = Sun lamp
-|type = Furniture
+| image = LampSun.png
-|type2 =
+| description = An industrial lamp which lights an area brightly enough to grow crops, but consumes a huge amount of power. Automatically turns itself off at night.
-|placeable = Yes
+| type = Building
-|size = 1 ˣ 1
+| type2 = Furniture
-|hp = 50
+| placeable = true
-|power = - 2900
+| path cost = 14
-|work to make = 330
+| passability = pass through only
-|resources to make = {{icon|steel|40}}
+| blockswind = true
-|deconstruct yield = {{icon|steel|30}}
+| cover = 0.2
-|mass base = 4.5
+| minifiable = true
+| size = 1 ˣ 1
+| mass base = 4.5
+| flammability = 1
+| hp = 50
+| sell price multiplier = 0.7
+| power = -2900
+| glowradius = 14
+| glowcolor = (370, 370, 370)
+| heatpersecond = 3
+| terrain affordance = light
+| research = Electricity
+| thingCategories = BuildingsFurniture
+| work to make = 330
+| resource 1 = Steel
+| resource 1 amount = 40
+| destroyyield = nothing
 }}
-Sun lamps provide artificial light to roofed growing zones (greenhouses) at high power expense (2,900 watts). A sun lamp will illuminate tiles within a five-block radius at 100% and outside tiles at only 50% or less. Sun lamps automatically turn themselves off at night to save power while the plants are resting. Once installed, the lamp menu offers the option to create a growing zone that matches its radius.  Sun lamps become available after [[research]]ing Electricity.
+'''Sun lamps''' provide artificial light in the absence of sunlight, such as an indoor [[growing zone]].
+== Acquisition ==
+{{Acquisition}}
-=== Short circuits ===
+== Summary ==
-Rain on a powered sun lamp will cause short circuits and fires. A roof will prevent this.
+[[File:Sun lamp grow radius.png|thumb|left|Radius of light sufficient to grow. Displayed radius shown in [[sterile tile]], tiles where plants can be grown outside of the radius shown in [[gold tile]]]]
+A sun lamp consumes {{#expr:-{{P|Power Consumption #}}}} W of [[power]] from 06:00 to 19:12, the period where plants can grow. While online, it provides 100% [[light]] within a 6.5-tile radius. This provides 120 tiles with sufficient light to grow. Note that this is '''not''' reflected by the radius displayed when constructing a sun lamp, and following the displayed radius would result in 100 growable tiles, ignoring 20 tiles that could otherwise be used.
-If the area is unroofed, you can simply switch the sun lamp off. In biomes with a growing season, turning off the sunlamp and removing the the roof can help save power when the weather is warm.
+This allows [[crop]]s like [[rice plant]]s to grow in a [[roof]]ed room. As the natural sun doesn't always provide 100% light at day, a sun lamp causes plants to grow somewhat faster. They also provide at least 30% light in a 13-tile radius, which is enough to prevent penalties for being in darkness.
-== Greenhouses ==
+Due to RimWorld's [[temperature]] mechanics, an enclosed room with a mostly complete [[roof]] is required to actually heat or cool an area.  Lamps themselves give a marginal amount of heat, 3 heat per second.
-Sun lamps allow indoor growing but don't produce heat, so [[heater]]s may be required to attain proper conditions for plant growth.  [[Events#Solar flare|Solar flares]] will cut the power, so prepare a [[shelf]] with emergency wood to build [[campfire]]s to keep the room temperature above -10C/14F. Double-width walls provide more insulation against temperature changes (and thus save power on [[heater]]s or [[cooler]]s), as well as offering better protection from attacks.
-Sun lamps placed on dirt can let your colony produce things like corn or smokeleaf even during a toxic fallout, or in a cold biome with no growing season. If you maintain proper growing temperature, a dirt floor greenhouse will have 100% fertility on normal soil and 140% on fertile soil. Trees such as pine, birch, saguaro or cocoa trees cannot be grown in a greenhouse because they can't be planted under a roof.
+[[Rain]] or [[snow]] on a powered sun lamp will cause [[short circuit]]s and [[fire]]s. A roof will prevent this.
-[[Hydroponics basin]]s boost plant growth to 280% speed and do not require soil. However, they can only grow certain crops and are dependent on electricity. If a hydroponics basin loses power, all plants on it will die quickly. The configuration in the image below will fit 24 hydroponics basins under a single sunlamp.
+== Analysis ==
+{{Image wanted|section=1|reason=replacement for [[:File:Optimal_sunlamps.png]] with new radius}}
+A sun lamp's main purpose is to create growing zones indoors, often called greenhouses. This allows plants to grow in the winter, when used with a [[heater]]. In extremely hot [[biome]]s, you might need coolers to grow during in the summer. Even in an "year-round" growing season, unpredictable events such as [[Events#Toxic_fallout|toxic fallout]] and [[Events#Volcanic_winter|volcanic winter]]s can disrupt plant growth. Double-width walls provide more insulation against temperature changes, and potentially save on heater/cooler costs.
-[[File:SunlampHydroponics.png|frameless]]
+[[Events#Solar flare|Solar flares]] will cut the power, so prepare a [[shelf]] with emergency wood to build [[campfire]]s to keep the room temperature above {{Temperature|-10}} (below which most plants will rapidly die).
-If you have [[Biofuel_refinery|biofuel refining]] researched, you can use food produced by hydroponics to fuel chemfuel generators to help power the greenhouse array. This is so efficient that it violates thermodynamics, and leaves you with spare food for your colonists as well.
+As they cannot be grown under roofs, trees such as pine, birch, saguaro or cocoa trees may not be grown in completely closed greenhouses.  They may only be grown in greenhouses with roofs open in a grid pattern, and those leak a lot of temperature-controlled air. As these roofs will let in sufficient natural sunlight in most biomes, there is no need to place a sun lamp inside tree greenhouses.
+<div style="clear:left></div>
-In 1.0 you need to place the sun lamp's growing zone manually. It can be made as a plus sign (+) in which each line is 5 tiles wide by 11 tiles long, with a 9 by 9 square in the middle. You can use the Planning tool to map this zone before placing your sun lamp.
+=== Power ===
+If you have [[Biofuel refinery|biofuel refineries]] available, you can use food produced by hydroponics to fuel chemfuel generators to help power the greenhouse array. This is so efficient that it violates thermodynamics, and leaves you with spare food for your colonists as well.
-The lamp blueprint will show the outline of its light radius until it is placed. Once the blueprint has been placed, the light radius won't be visible again until the lamp has been built.
+As sun lamps turn off at night, they consume an average of {{#expr: -(0.8-0.25)*{{P|Power Consumption #}}}} W⋅Days. [[Batteries]] can be used to average out power usage. However, batteries only take in energy at a 50% rate, effectively meaning double the power is required at night, for a required power generation of {{#expr: -floor(2*(0.8-0.25)/(1+0.8-0.25)*{{P|Power Consumption #}})+10}} W⋅Days assuming 100% consistent power generation and a single battery with a passive loss of -5W⋅Days per day. As this only requires {{#expr: -((0.8-0.25)*{{P|Power Consumption #}})*(1-0.8+0.25)*0.5/(1-0.5*(1-0.8+0.25)) round 1}} W⋅Days of storage and a battery holds 600 W⋅Days, fewer batteries and infinitesimally less generation is needed when multiple sun lamps are supported.
+Otherwise, 2{{Check Tag|Verify/Detail|Added equator note, but where exactly is this true and how close a call is it?}} [[solar generator]]s are roughly enough to power a single sun lamp in equatorial regions, not counting any hydroponics basins.
-=== Legacy controls ===
+=== Hydroponics ===
+{{Rewrite|section=1|reason=Account for change in light radius. Upload new image of maximum hydroponics packng, mention potential for improvement re: multtiple aligned sub lamps}}
+You can grow crops indoors with or without [[hydroponics basin]]s. It is more cost effective to grow on soil, assuming you have soil available.
-In previous versions of the game, the sun lamp menu allowed you to automatically create a growing zone within its light radius.
+* The 24 hydroponics basins would cost {{Required Resources|Hydroponics basin|24}} for a total of 2.8 sun lamp's worth of growth. This does not count the extra 1680 W of power required for those basins.
+* You could instead make and power 2 more sun lamps. 4 [[solar generator]]s are enough to power those lamps, and would only cost {{Required Resources|Solar generator|4}}. Even when considering [[batteries]], [[heater]]s, and the {{Icon Small|steel}} 80 for sun lamps themselves, making ''more'' sun lamps is more efficient than building hydroponics for 1.
-[[File:Sun lamp H.png|500px]]
+If your only goal is to grow crops during the winter, then placing multiple sun lamps without hydroponics is more resource efficient than using hydroponics. However, the lamps would end up taking up more space. Therefore, hydroponics are best used when growing space is limited, like inside a mountain or in an [[biomes#Ice sheet|ice sheet]].
-{{nav|furniture|wide}}
+In the late game, hydroponics have a few advantages. Due to their reduced space, it takes less travel time, which makes work more efficient and defense easier. They take up less power per tile, too. When you have access to [[deep drill]]s and [[fabrication bench|fabrication]], you can easily afford the steel and component cost.
-[[Category:Furniture]]
+{{Clear}}
-[[Category:Food]]
+== Version history ==
+* [[Version/0.17.1546|0.17.1546]] - Now turn themselves off when plants are resting.
+* [[Version/1.2.2753|1.2.2753]] - Fix: [[Gloomlight]] would prevent a sun lamp from producing "brightly lit" cells within the radius of the Gloomlight. Due to: the glowColor of the Gloomlight not having an explicit alpha of zero. It now correctly ignores the alpha from the xml.
+* [[Version/1.3.3117|1.3.3117]] - Fix: Sunlamp does not trigger blinding light for [[Ideoligion#Darkness|Darkness]]{{IdeologyIcon}} pawns.
+* [[Version/1.5.4062|1.5.4062]] - Unreported change to sun lamp lit radius, increasing it, without increasing the displayed radius when constructing the lamp.
+<gallery>
+SunlampHydroponics.png|Pre-1.5 densest hydroponics set up.
+</gallery>
+{{Nav|furniture|wide}}
+[[Category:Furniture]] [[Category:Lamp]]
+[[Category:Food Production]]