According to the search results, the ghost that breaks lights in Phasmophobia is most likely the Mare. The Mare has a distaste for light and will be enhanced in the dark. It tends to turn off light switches more than other spirits, and it cannot turn on lights. Additionally, players can test for Mares by turning on the lights and seeing if the ghost turns off the lights quickly. The Mare will break the bulb in the lamp, which can be heard if the player is nearby.