Light can be produced from gas ionization using radio waves, as demonstrated by fluorescent tubes lighting up near power sources and by gas-discharge tubes that illuminate when attached to cell phone antennas. Experiments show that RF sources can sustain gas tubes without the need for traditional neon circuits, allowing for versatile lighting options. However, using RF to stimulate gas discharge in public spaces raises safety concerns regarding electromagnetic fields. Alternatives like low-level radio signals or ultrasonic transmissions can control lights without the risks associated with direct RF exposure. Overall, the discussion emphasizes the potential and challenges of using radio waves for lighting applications.