Standard R39 reflector shape and E17 screw base replacement bulbs for lava lamp and glitter lamps,Bulb Diameter:39mm/1.54in height:59mm/2.3in Safe & High Temp Resist up to 300°C/527°F: Our lava lamp bulbs feature high-temperature protection, preventing the bulbs from burning out due to overheating. Designed to melt lava magma without over heating, or under heating scented candlewax. Additionally, they are equipped with waterproof and shatterproof protection, ensuring safe use and reducing the hassle of frequent bulb replacements. lava lamp bulbs can effectively heat the "lava" material to produce the visual effect of flowing lava. Add romance and mystery to your space With a single purchase, you will be sure to meet your light needs all-around your home for the longest time possible. These long lasting Incandescent bulbs provide approximately 2,000 hours of light and warmth or more. Designed with E17 socket and candelabra LEAD FREE base which is better for human health and the environment. Turn on at full brightness with 150 lumens and 2700K. These bulbs are dimmable that you can create the atmosphere you want by adjusting the brightness level. These bulbs have no flickers neither lead nor mercury. No UV or IR Radiation. Standard R39 reflector shape and E17screw base replacement bulbs for lava lamps and other decorative lighting accessories