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# Factorio Prototype Docs Version 2.0.77

# RailSignalLights - Prototype Docs

## RailSignalLights :: struct

## Properties

- default
- sorted

red optional | :: RailSignalLightDefinition |
green optional | :: RailSignalLightDefinition |
blue optional | :: RailSignalLightDefinition |
yellow optional | :: RailSignalLightDefinition |

blue optional | :: RailSignalLightDefinition |
green optional | :: RailSignalLightDefinition |
red optional | :: RailSignalLightDefinition |
yellow optional | :: RailSignalLightDefinition |

## Properties

### red :: RailSignalLightDefinition optional

### green :: RailSignalLightDefinition optional

### blue :: RailSignalLightDefinition optional

### yellow :: RailSignalLightDefinition optional

Type used in

- RailSignalPictureSet::lights