Light Source Economy Planner

Input your current light source inventory and battery count. Get total illumination time, battery efficiency analysis, and Sebastian's Shop purchase recommendations.

Batteries in Inventory

Current Kroner

Light Sources Carried (check all that apply)

Standard Flashlight Lantern Flash Beacon Blacklight Gravelight Necrobloxicon Hand-Cranked Gummylight

Rooms Remaining (~)

Light Source Economy Explained

Battery management is one of the most critical economic decisions in Pressure. A single battery restores 50% charge on a Standard Flashlight, giving approximately 63 seconds of illumination. The Flash Beacon is far more efficient, converting 1 battery into 10 burst charges.

At Sebastian's Shop (mid-run), battery prices escalate. Pre-round batteries are always cheaper. For a standard 100-room run, you need roughly 8-12 minutes of total illumination depending on play speed. The Necrobloxicon and Gravelight both have self-regenerating fuel, making them the best long-term investments.