I use them in SALT LAMP. This means the light bulb stays on 24/7 until it burns out. They last a very long time compared to some brands I've bought at retail. Shops around me have stopped selling light bulbs with the "Exit" sign that are the same size and wattage. The new replacement bulbs aren't specifically made for exit signs, so I've been checking them about every 3 weeks since then. Ouch! I am very satisfied with the performance and durability of these lamps. Thanks for a quality product.
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