Features: 1.The 25W bulbs is replace for standard size (13-14 inch) lava lamp,glitter lamps 2.The 25w bulb is an S11 with an E17 Intermediate base 3.We sell 25 watt and 40 watt bulbs,be sure to check whether a 25-watt or a 40-watt bulb is needed by your lamp 4. Long-lasting Bulbs 5.These lamp will get hot enough to allow the lava to flow 6.Comes with safely wrapped to avoid damage