Light Bulbs in ARC Raiders are mostly found in electrical-themed areas on Dam Battlegrounds and The Blue Gate, with a few spots acting as near-guaranteed spawns.

Main farming spots

  • Dam Battlegrounds – Electrical Substation
    • Go to the Electrical Substation in the south of Dam Battlegrounds and look for a white car on the south side of the facility, between the broken wire fence and the building.
* Breach and loot the car’s hood; it very often contains 1–2 Light Bulbs and is treated by many players as an almost guaranteed spawn each run.
  • Dam Battlegrounds – Generator Hall / Power Generation Complex
    • At Generator Hall, check the surface car just southeast of the extraction lift, near some abandoned buses; breaching this car is another reliable Light Bulb spot.
* In the Power Generation Complex to the north, search the underground tunnels and especially the eastern control room packed with searchable containers, fuse boxes, and panels for extra bulbs and other electrical loot.

Extra guaranteed-style spawns

  • Field Depot between Power Generation Complex and East Broken Bridge
    • Inside this small Field Depot building, look for a computer desk with a searchable drawer in a corner; this drawer is described as a guaranteed Light Bulb spawn unless another player looted it first.
* Combining this drawer with the car at Generator Hall and the Substation car can net you multiple bulbs in one short loop.
  • The Blue Gate – Pilgrim’s Peak
    • Head to Pilgrim’s Peak in the northeast of The Blue Gate map and climb using your grappling hook toward the top of the structure.
* Just before the summit, drop into the room below instead of going all the way up; there are two red lockers here, and one is reported as a guaranteed Light Bulb spawn.

General tips for “where to find light bulbs arc raiders”

  • Focus on zones marked with the lightning-bolt icon on your map: these indicate electrical loot areas with higher chances for Light Bulbs.
  • Prioritize:
    • Cars you can breach and search.
    • Control rooms with many panels, lockers, and desks.
    • Underground tunnel complexes and smaller electrical buildings.
      These spots consistently drop Light Bulbs along with wires, sensors, and other electrical components.

TL;DR: Run a loop on Dam Battlegrounds hitting the Electrical Substation white car, Generator Hall car, and the Field Depot drawer, then use Pilgrim’s Peak lockers on The Blue Gate if Dam is contested.

Information gathered from public forums or data available on the internet and portrayed here.