● 1.Standard R39 reflector shape and E17 screw base replacement bulbs for lava lamp and glitter lamps ● 2.25 Watt incandescent reflector lamp heat evenly to lava lamp and make it flowing ● 3.Works great for standard small lava lamps ● 4.High reliability,long life-span,packaged very well to avoid the damage in the course of shipment ● 5.What you get:4 pack reflector light bulbs,which get "hot" enough to melt/soften the "lava" material of the lampReplacement Bulbs for Lava Lamps,Glitter Lamps,R39 E17 25 Watt Reflector Bulbs