Add an advanced system for power, that actually adds the gameplay. How it works is that there is one global power source and a lot of power consuming tools. However, there is not enough power to support all things, so the player has to sacrifice tools. For example:
Global Power ->
|-----> Camera System
|---x Flashlight
|-----> Office Light
In this example the player turned off the flashlight in order to use the camera system and have the office lit.
Add an advanced system for power, that actually adds the gameplay. How it works is that there is one global power source and a lot of power consuming tools. However, there is not enough power to support all things, so the player has to sacrifice tools. For example:
In this example the player turned off the flashlight in order to use the camera system and have the office lit.