Highlights of Spanish Astrophysics VII, Proceedings of the X Scientific Meeting of the Spanish Astronomical Society held on July 9  13, 2012, in Valencia, Spain. J. C. Guirado, L.M. Lara, V. Quilis, and J. Gorgas (eds.) Light pollution in Valencian Natural Parks: where light not only annoys astronomers Enric Marco 1,4 , Angel Morales Rubio 2,5 , and Joan Manuel Bull´ on 3,4 1 Departament d’Astronomia i Astrof´ ısica, Universitat de Val` encia 2 Departament de Qu´ ımica Anal´ ıtica, Universitat de Val` encia 3 Agent Mediambiental-Cap de Zona, Conselleria d’Infraestructures, Territori i Medi Ambient, Generalitat Valenciana 4 Agrupaci´ o Astron` omica de la Safor 5 Coordinadora en Defensa de los Bosques del Turia Abstract Street lighting of the city of Valencia produces a yellowish halo that prevents astronomical observation. Moreover, within the metropolitan area, there are three natural parks: the Parc Natural de l’Albufera, the Parc Natural del T´ uria and the Parc Natural de la Calderona. The light pollution affects the nighttime wildlife parks. Therefore, since 2010, a campaign is being carried out in order to collect data but also to raise awareness and reporting of the harmful effects of excessive and incorrect installation of existing luminaires. Since 2012 this study has been extended to other Valencian natural parks far from Valencia. Their sky darkness is a value to preserve. 1 Introduction Light pollution not only affects astronomical observation. It is internationally well reported that excessive number of artificial light points radiating indiscriminately in all directions exerts strong effects on the wildlife that lives around night and light cadence. The Valencian parks are very affected by the problem, and apart from the Parc Natural de l’Albufera, no rigorous study has been done to date on them. The Parc Natural del T´ uria suffers great urban pressure due to its proximity to the Valencia metropolitan area. Pollution caused by light excess affects the environment inside and outside the park. Since 2010, an intensive data collection campaign and the presentation of the results in an international conference [1], as well as the report, awareness and dissem- ination in the media and in civil society are starting to achieve some results as the recent