Reactor Lamp is the shell block that lights the inside of a reactor room in the Ala Industrial mod for Minecraft 26.2 Java Edition on Fabric and NeoForge. A formed reactor room is a sealed box without a single opening, and an ordinary torch cannot help: a torch is not a shell block, so the scanner reads its cell as a breach in the wall. Reactor Lamp solves this by being casing that glows: the scanner counts the lamp as Reactor Casing, lets it replace any shell cell in walls, floor or ceiling, and never bills the lamp against the 30 percent glass share reserved for Reactor Glass. The lamp block itself emits light level 0 in every state — instead, the Reactor Controller places an invisible vanilla light source at level 15 in the interior cell the lamp faces, only while the room stands formed.

Because the light is born one cell inside the room, not one drop of it leaks outside, and level 15 is the maximum Minecraft offers: even a 12×12×12 interior keeps no dark corners, so no mob can spawn inside a sealed hall you cannot chase it out of. A lamp set into an edge or corner cell stays dark, because such cells have no neighbour inside the room — plan lamps into faces. Reactor Lamp draws no EU at all (0 EU/t): no energy crosses a sealed shell, and the light is bound to the room's state rather than to a cable. The block is as tough as the rest of the shell — hardness 5, blast resistance 30, pickaxe to break — and survives even a meltdown, because every shielding-alloy shell part is meltproof. One Reactor Lamp crafts from four iron ingots, three colourless glass blocks, one glowstone and one Shielding Plate.