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Lighthouse & Electricity Guide

Season Mechanic · 2026-03-24

The Lighthouse Is Your Lifeline

If Season 2 had the Furnace and Season 3 had the Curse Research Lab, Season 4 has the Lighthouse. It is the single most important system in Evernight Isle, and everything your alliance does either supports or depends on it.

The Lighthouse dispels darkness in a radius around your base and grants the Light Buff to all allied units within that radius. Without it, you are operating under crippling penalties that make every aspect of gameplay harder. This is not a nice-to-have — it is survival.

Think of It Like the Furnace

If you played Season 2, treat the Lighthouse with the same urgency as the High-Heat Furnace. Letting it go dark is the Season 4 equivalent of dropping below -20C. You lose the ability to function. Your troops are slower, your resources are gutted, and the zombies around you are stronger. There is no "I will deal with it later." You deal with it now or you fall behind permanently.

How the Lighthouse Works

The Lighthouse is a zone-based system. When powered, it creates a circle of light around your base. Everything inside that circle benefits from the Light Buff. Everything outside suffers darkness penalties.

Light Buff Effects

Units and bases inside the Lighthouse zone receive:

  • Full resource generation — no darkness penalty
  • Normal march speed — your troops move at their intended speed
  • Standard zombie difficulty — PvE content at expected difficulty levels
  • Bonus combat stats — a small but meaningful boost to all troop stats while in the light

Darkness Penalties

Units and bases outside the Lighthouse zone suffer:

PenaltyEffect
Generation Rate-30% to all resource production. This compounds every hour you are in darkness
March Speed-20% to all troop march speed. Your rallies arrive late, your reinforcements are slow, your retreats are sluggish
Zombie StrengthZombies in dark zones hit harder and take more damage to kill. PvE becomes significantly more expensive
Troop MoraleExtended darkness exposure degrades troop effectiveness across the board

The -30% generation rate is the silent killer. You might not notice it hour by hour, but over days and weeks it creates an enormous resource gap between alliances that stay lit and alliances that do not. The -20% march speed is the one that gets you killed in PvP — your opponent's rally arrives 20% faster than yours, and that timing difference wins fights.

Lighthouse Range

The Lighthouse does not cover the entire map. Its range depends on its power level:

  • Higher power means a larger circle of light
  • A fully powered Lighthouse covers a generous area, but not infinite
  • Alliance members should base near each other to share Lighthouse coverage
  • Isolated members outside the Lighthouse range are effectively playing with a permanent handicap
Stay Close to Your Alliance

Do not teleport to a random corner of the map and expect to be fine. The Lighthouse covers a fixed radius. If you are outside it, you are in darkness with all the penalties that entails. Base near your alliance centre, near the Lighthouse, and stay in the light. Lone wolves in Season 4 get eaten by the dark.

Generators and Zombie Fuel

Electricity does not appear from nowhere. The Lighthouse runs on power from Generators, and Generators run on captured zombies. This creates the core resource loop of Season 4.

The Power Chain

  1. Capture zombies — hunt and capture zombies on the world map
  2. Feed Generators — send captured zombies to your Generators
  3. Generate electricity — Generators convert zombies into power
  4. Power the Lighthouse — electricity keeps the Lighthouse active and expanding its range
  5. Stay in the light — the Lighthouse dispels darkness and buffs your alliance

If any link in this chain breaks, the whole system fails. No zombies means no power. No power means no Lighthouse. No Lighthouse means darkness penalties for everyone.

Zombie Capture Tips

  • Farm zombies between Blood Night windows when they are at normal strength
  • Higher-level zombies provide more Generator fuel per capture
  • Coordinate with your alliance to avoid over-farming a single area — zombie spawns have limits
  • Do not waste troops fighting zombies you cannot capture efficiently
  • Set a daily zombie capture quota for your alliance — treat it like gathering resources

Generator Management

PriorityDetails
Keep Generators fed constantlyA Generator with no zombie fuel produces no electricity. Empty Generators mean a shrinking Lighthouse
Upgrade Generators earlyHigher-level Generators convert zombies into electricity more efficiently
Balance fuel across GeneratorsDo not overload one Generator while others sit empty. Spread the fuel for consistent output
Monitor fuel levels before Blood NightBlood Night increases power consumption. Top off your Generators before each window

Electricians

Electricians are one of the most important cooperative mechanics in Season 4. You can send Electricians to allied players to improve their Light Status and boost their virus resistance (VR).

How Electricians Work

  • Each player generates Electricians passively over time
  • You send Electricians to other alliance members — not to yourself
  • Receiving Electricians improves the target's Light Status, even if their personal power is low
  • The VR boost from Electricians stacks with other VR sources
  • Electricians are consumed when sent — they do not return

Electrician Distribution Strategy

This is where alliance coordination matters. Random Electrician distribution is a waste. Smart distribution wins seasons.

StrategyWhen to Use
Focus on weakest membersDefault strategy. Keep your lowest-power members above the darkness threshold so they can contribute
Focus on rally leadersBefore Copper War attacks. Boost the VR and Light Status of players leading rallies for maximum combat effectiveness
Focus on garrison defendersDuring city defence. Stack Electricians on players garrisoning contested cities
Emergency distributionAfter a Blood Night knocks someone into darkness. Rapidly send Electricians to get them back online
Coordinate Through Leadership

Alliance officers should direct Electrician distribution. Post daily instructions in alliance chat: who needs Electricians, who should be sending them, and how many. Without coordination, Electricians get sent randomly and the weakest members stay dark while strong members who do not need help get overfed. Treat Electrician allocation the way you treat rally assignments — with a plan.

Blood Night Descend

Three times every day, the darkness fights back. Blood Night Descend occurs at fixed server times and turns the already-dangerous Evernight Isle into something much worse.

Schedule

WindowDetails
02:30 -- 03:00 Server TimeThe overnight window. Most players are asleep. Set defences before you log off. Do not leave troops on the map
10:30 -- 11:00 Server TimeThe morning window. Schedule your zombie farming before or after this — never during
18:30 -- 19:00 Server TimeThe prime time window. Most active period on most servers. Coordinate alliance defence if under threat

What Happens During Blood Night

  • Zombies power up dramatically — normal zombies become significantly harder to kill
  • Doom Elites spawn — elite zombie enemies that are extremely resistant to damage and hit brutally hard
  • Darkness intensifies — even active Lighthouses get pushed back, reducing their effective range
  • Generator consumption spikes — your Lighthouse burns through power faster during Blood Night
  • PvE content scales up — everything on the map becomes harder for 30 minutes

Blood Night Survival Rules

  1. Do not solo farm during Blood Night. The zombie power spike makes solo attacks a waste of troops and speedups
  2. Rally Doom Elites with your alliance. They are designed for group content, not solo attempts
  3. Top off Generators before each window. Power consumption spikes during Blood Night — do not enter it on empty
  4. Recall vulnerable marches. If you have troops on the map gathering or scouting, pull them back before the window starts
  5. Use Blood Night offensively in Copper War. Defenders in darkness during Blood Night are at their weakest — this is when you attack contested cities
Plan Your Day Around Blood Night

Blood Night is not random — it is on a fixed schedule. There is zero excuse for being caught off guard. Set alarms for 02:25, 10:25, and 18:25 server time. Five minutes of warning is enough to recall marches, top off Generators, and alert your alliance. The players who treat Blood Night as an inconvenience instead of a scheduled event are the ones who bleed troops every single day.

Alliance Power Station

The Alliance Power Station takes electricity management from an individual task to an alliance-wide system. Instead of every member independently scrambling to keep their own Lighthouse running, the Power Station pools electricity resources.

How It Works

  • The Power Station acts as a centralised electricity reserve for the entire alliance
  • Alliance officers can direct power from the pool to specific members who need it
  • Stronger players who generate surplus electricity can contribute their excess to the pool
  • During high-demand moments like Blood Night, the pool buffers against individual shortages

Why It Matters

Without the Power Station, every player is on their own. If one member runs out of zombie fuel and their Lighthouse dies, they are stuck in darkness until they personally fix it. With the Power Station, the alliance can cover gaps and keep everyone lit.

Power Station PriorityDetails
Keep the pool above minimumThe pool should never hit zero. Maintain a buffer for emergencies
Strong players contribute firstPlayers with surplus electricity should donate to the pool before hoarding
Prioritise Blood Night reservesStock the pool before each Blood Night window to handle the consumption spike
Officers manage distributionDo not let power flow passively. Officers should actively allocate pool resources to members who need them

Lighthouse vs Furnace: Season 2 Veterans

If you played Season 2, here is how the Lighthouse compares to the Furnace:

AspectComparison
Core resourceCoal (S2) vs Captured Zombies (S4). Both require constant farming, but zombies are harder to gather during Blood Night
Penalty threshold-20C lockout (S2) vs Darkness penalties (S4). Season 4 penalties are less binary but more constant
Alliance buildingAlliance Furnace (S2) vs Alliance Power Station (S4). Same concept, different execution
Cooperative mechanicHeat sources (S2) vs Electricians (S4). Electricians are more direct — you send them to specific players
Crisis eventsCold Wave (S2) vs Blood Night (S4). Blood Night happens 3x daily on a fixed schedule — much more frequent

The biggest difference is frequency. Cold Waves in Season 2 were periodic events. Blood Night in Season 4 happens three times every single day. The management burden is higher, and the penalty for ignoring it is constant rather than occasional.

Lighthouse Priority Checklist

  1. Power your Lighthouse on Day 1 — do not wait. Darkness penalties are active from the moment the season starts
  2. Establish a zombie capture rotation — assign alliance members to hunting shifts so Generators never run dry
  3. Upgrade Generators early — higher-level Generators are more fuel-efficient
  4. Coordinate Electrician distribution — alliance officers should post daily assignments
  5. Top off power before every Blood Night — 02:25, 10:25, and 18:25 are your warning times
  6. Contribute surplus to the Alliance Power Station — individual hoarding hurts the alliance
  7. Base near your alliance centre — Lighthouse range is limited, and isolated members lose coverage
  8. Monitor fuel levels daily — treat this like checking coal in Season 2, but more frequently

Common Lighthouse Mistakes

  1. Letting the Lighthouse go dark and "fixing it later" — every hour in darkness is resources lost and fights lost
  2. Farming zombies during Blood Night — you spend more troops and get less fuel. Farm between windows
  3. Not upgrading Generators — low-level Generators waste fuel. The upgrade pays for itself quickly
  4. Sending Electricians randomly — without coordination, the players who need help most get overlooked
  5. Basing far from the alliance — you cannot benefit from the Lighthouse if you are outside its range
  6. Ignoring the Alliance Power Station — it exists to prevent individual failures from cascading into alliance-wide darkness
  7. Not preparing for Blood Night power spikes — Generators burn faster during Blood Night. If you enter the window on low fuel, your Lighthouse shrinks or dies

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