Neon is used in several ways in today’s world:
1. **Lighting and Signs**: The most well-known use is in **neon signs**—bright, colorful advertisements often seen in storefronts and entertainment districts.
2. **High-voltage indicators and vacuum tubes**: Neon gas glows when electrified, making it useful in **warning lights** and **old electronic devices**.
3. **Television and plasma screens**: Neon, along with other noble gases, helps produce colors in **plasma display panels**.
4. **Helium-neon lasers**: These are used in **barcode scanners**, **scientific instruments**, and **holography**.
5. **Cryogenics**: Liquid neon is used as a **refrigerant**, especially when extremely low temperatures are needed.
6. **Aircraft and automotive lighting**: In some **high-performance or decorative lighting** systems.
Though LED technology has replaced many traditional neon signs, neon still has a place in **art, design, and scientific applications**.
