Octal is a project part of Stars4All program. Our aim is to create an experience where citizens around the globe could learn the relevance of protecting the night from light pollution.


We want to create a game experience to scout cities around the world and collect light during the night. We will compare among those cities which is the most light polluted one.


We are creating a spectrometer for mobile phones, which allows us to do both qualitative and quantitative measures of light pollution. The quest is to identify how many stars they can see during the night, and how the light behave at the same time.

Who support us

Octal is funded by European Union’s Horizon 2020 through Stars4All initiative. Also, is supported by Common Action Forum and Asociación de Consumidores Responsables.


Our team is composed by a group of volunteers experts in different fields.