Specifically designed for lava lamps, these 25W R39 bulbs operate comfortably at temperatures up to 300C, which is crucial for the proper functioning of a lava lamp. The heat generated by the bulb warms the wax inside the lamp, causing it to rise and fall as it changes density, creating the iconic flowing motion. This high-temperature tolerance ensures the bulb can safely and consistently drive the lamp's mesmerising effects.
eBay