Need to replace those specific F18DTT/35/4P bulbs? This 2-pack has you covered with direct replacements that work in Westinghouse fixtures requiring this bulb type. Each bulb is 18 watts and designed to match the specifications of the original Westinghouse version. Having two bulbs means you can replace multiple fixtures or keep a spare on hand for when the next one burns out. While these aren't manufactured by Westinghouse, they're made to compatible standards to ensure proper fit and function in your fixtures. Perfect for various lighting applications where this specific bulb type is required. No more searching hardware stores for this less common bulb size - keep these backups in your supply closet and you'll always be prepared when a bulb needs replacing. The 2-pack offers better value than buying singles and ensures consistent lighting across your fixtures. Your lighting maintenance just got simpler with these reliable replacement bulbs!