Ceiling Light

Ceiling Light is a built light source used to illuminate interior spaces. In-game light functions as a gameplay mechanic that directly influences Duplicant morale and supports plant cultivation; Ceiling Light supplies the light that produces these effects. It is intended to be installed inside rooms and facilities where artificial illumination is required rather than relying on natural light.

Light produced by Ceiling Light reduces Duplicant stress, making illuminated areas preferable for living quarters, workspaces, and recreational areas. The presence of light improves the psychological environment for Duplicants and contributes to a lower overall stress load when they spend time in lit areas. Light is also a necessary condition for the growth of certain plants; crops and decorative plants that require illumination will only grow or progress through their growth cycles when supplied with adequate light, which Ceiling Light provides indoors.

• Ceiling Light is a source of light used to change the environmental lighting state of a tile or room.
• The primary gameplay effects of illumination are stress reduction for Duplicants and enabling growth for light-dependent plants.
• Place Ceiling Light in living and working areas to maintain lower stress levels for Duplicants and in hydroponic or farm rooms to meet plant light requirements.
• Using Ceiling Light allows interior spaces that are isolated from natural sunlight to still offer the benefits of illumination.

Because Ceiling Light is responsible for the game’s lighting effects, it is a foundational tool for both colony welfare and agriculture when natural light is unavailable or insufficient. Its function links directly to two separate systems—Duplicant stress mechanics and plant growth mechanics—so proper use of Ceiling Light supports both colony productivity and Duplicant well‑being.