1. Turning lights on
   "it's lighting-up time"

See also: light

• octette
• octillion
• octo-
• October
• October 12
• October 24
• October Revolution
• Octoberfest
• octodecimo
• octogamy
• octogenarian
• octonary
• octopod
• Octopoda
• Octopodidae
• octopus
• octoroon
• octosyllabic
• octosyllable
• octroi
• octuple
• octuplet
• octyl
• ocular
• ocular muscle