Related Clues:

• ''Open 24 hours'' sign, perhaps
• Gas in advertising lights
• Light up in a bar
• Advertising medium
• Vacuum tube gas
• Sign of nightlife?
• Gas on The Strip
• Glowing gas
• Glowing discovery of 1898
• Nighttime lure
• Gaseous attention-getter?
• Eye-catching sign type
• Old Dodges
• City lights
• Some Las Vegas lights