From Lexicanum

The Searchlight is an Imperial and Chaos vehicle upgrade for use during night fighting scenarios. While it is useful for illuminating enemies, it also makes the vehicle with the searchlight mounted on vulnerable to return fire from the enemy.

Armies and Vehicles

• Imperial Guard
  • Chimera
  • Sentinel
  • Hellhound
  • Leman Russ Battle Tank
  • Leman Russ Demolisher
  • Basilisk
  • Baneblade

• Space Marines
  • Rhino
  • Razorback
  • Whirlwind
  • Vindicator
  • Predator Destructor
  • Land Raider

• Daemonhunters
  • Predator Annihilator
  • Predator Destructor
  • Land Raider
  • Land Raider Crusader

• Witch Hunters
  • Rhino
  • Immolator
  • Exorcist

• Chaos Space Marines
  • Rhino
  • Dreadnought
  • Predator
  • Defiler

Sources

• Warhammer 40,000: Wargear
• Codex: Imperial Guard (3rd Edition) (Both Editions)
• Codex: Space Marines (4th Edition)
• Codex: Daemonhunters (3rd Edition)
• Codex: Witch Hunters (3rd Edition)

Related Articles

• Imperial Guard Vehicle Upgrades
• Space Marine Armoury
• Witch Hunters Armoury
• Daemonhunters Armoury