The Lava Lamp 40-Watt Replacement Bulb 2-Pack is made specifically for the 17-Inch and 16.3-Inch Lava Lamps for the perfect fit every time. Even better, it comes in packs of two! For over fifty years, the iconic Lava brand has been the pioneer in novelty and conventional lighting products, and today it stands as one of the most recognized, trusted, and beloved brands of all time.  At Lava, our commitments to pursuing the latest fashion trends, cutting-edge technology, and unsurpassed quality ensure that we continue to intrigue our fans while enticing the younger generation with our exciting new product lines. So, no matter your age, we have a Lava Lamp product just right for setting the mood of your life.