2x 25W R39 Dimmable Pearl Reflector Spotlight, Lava Lamp Light Bulb, SES E14 | eBay
R39 E14 Base Lava Lamp Bulb, 30 Watt Replacement Bulbs for Lava Lamps, Extra Long Life Reflector Spot Light Bulb, High Temp Resistant Lava lamp Light Bulb - Amazon.com