An on-air sign lit up means everything now counts, so it is read as a moment of no turning back. Tradition links it to readiness, nerves and speaking to many at once.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.