Can a lava lamp change colours on its own without changing the bulb?

A lava lamp cannot change colors on its own without changing the bulb. The color of the lamp is determined by the type of wax and the color of the liquid used inside, as well as the bulb’s color. While the wax moves and creates different visual effects when heated, the overall color remains constant unless the lamp itself is altered. To achieve different colors, you would need to replace the bulb or use a lamp designed with color-changing features.