A lava lamp is a type of novelty lighting fixture that gained popularity in the 1960s and has since become an iconic piece of retro decor. The lamp consists of a transparent container, typically made of glass, filled with a liquid and wax mixture. The most distinctive feature of a lava lamp is the mesmerizing, slow-moving blobs or "lava" inside the lamp.

The basic operation of a lava lamp involves a heat source at the base of the lamp that warms the wax, causing it to rise and fall in a lava-like fashion. The heat source is usually a light bulb, and the combination of heat and the specific density of the wax allows it to create the characteristic flowing motion. The liquid in the lamp is often a colored solution, adding to the visual appeal.

Lava lamps are often used for ambient lighting and are considered a decorative and nostalgic item.They come in various shapes, sizes, and color combinations, allowing individuals to choose a style that fits their taste and the overall aesthetic of a room.

In the context of Novelty Lighting and Tools Home Improvement, lava lamps are typically seen as fun and quirky additions to interior design. They are not usually relied upon as primary light sources but rather as decorative elements that can create a unique atmosphere in a space.

Lava lamps have experienced periodic revivals in popularity, and their retro charm continues to appeal to individuals seeking a touch of nostalgia or a distinctive lighting option for their homes or offices.