This instrutable is on a real lava lamp. I've seen Lava lamps on you tube and google but they are never real lava lamps the ones that are powered by a light or
A lava lamp is a decorative tube-shaped light fixture containing a colored, oily fluid that flows up and down throughout the lamp chamber in a manner reminiscent of molten lava.
The complete list of ingredients in the "Lava–lamp" is a company secret, but they are, fundamentally, coloured wax in coloured water. Invented by Edward Craven
In a liquid motion lamp, the heat usually comes from a light bulb. The heavier liquid absorbs the heat, and as it heats up, it expands. As it expands it becomes less dense. Because the liquids have very similar densities, the formerly heavier liquid is suddenly lighter than the other liquid, so it rises.