How does a lava lamp work?
A bulb of 15 to 40 W in the base heats the wax until it is lighter than the liquid around it, so it rises. At the top it cools, grows heavier and sinks back toward the bulb, and the cycle repeats.
As it gets further away from the light bulb, the wax begins to cool and becomes denser than the water, causing it to sink back toward the light bulb.
That is why a lava lamp needs 2 to 3 hours to get going. The whole globe has to reach a steady temperature before the wax is warm enough to let go of the bottom.
What is inside a lava lamp?
A blend of wax in a liquid mixture, sealed in a glass globe of 12, 20 or 52 oz with a loose metal coil on the bottom. The exact recipe is a trade secret, and the globe is never meant to be opened.
All LAVA® motion lamps have a free floating coil inside the globe. This is to accelerate the heating process.
| Part | What it is | What it does |
|---|---|---|
| Globe | A sealed glass bottle, 12 to 52 oz | Holds the wax and the liquid. The cap stays on for life |
| Wax and liquid | A wax blend in a liquid mixture | The wax rises when warm and sinks when cool |
| Coil | A loose metal ring on the bottom of the globe | Gathers the heat and speeds up the melt |
| Bulb | A 15, 25 or 40 W incandescent bulb in the base | Gives the light and the heat together |
Who invented the lava lamp?
Edward Craven Walker, an English engineer, designed the first motion lamp in 1963 and sold it as the Astro Lamp. In 1965 two American entrepreneurs bought the rights to sell it worldwide, formed the Lava Corporation in Chicago and renamed it the Lava lamp.
The first motion lamp was designed in 1963 by an English engineer, Edward Craven Walker, who marketed it under the name Astro Lamp.
| Year | What happened |
|---|---|
| 1963 | Edward Craven Walker, an English engineer, designs the first motion lamp and sells it as the Astro Lamp |
| 1965 | Two American entrepreneurs see it at a trade show in Brussels, buy the rights and form the Lava Corporation in Chicago |
| 1965 | The LAVA LITE name goes into use in the United States on November 1 |
| 2019 | The current US registration of the LAVA LITE mark is issued, No. 5,833,586 |
Sources
The globe is sealed for a reason. Do not open it, top it up or heat it with anything but its own bulb.
- Schylling Inc.: LAVA Lamp Frequently Asked Questions. Read 2 October 2026.
- Schylling Inc.: LAVA Lamp Instruction Manual, series 1900 to 8000. Read 2 October 2026.
- Schylling Inc.: LAVA Lamp History. Read 2 October 2026.
- USPTO: Trademark Status and Document Retrieval, LAVA LITE, Reg. No. 5,833,586. Read 2 October 2026.
