Have you been looking for a three way? Many people seek them out and are frustrated at their limited availability. Some people may even be surprised to learn how many three ways their neighbors have in their homes. While a good three way may be elusive, they do exist if you know where to find them. Look now further, you have found the definitive three way website. Here we have every three way you could possibly desire. Three-way light bulbs have two filaments in them used to produce three different light levels. For the lowest setting, one filament comes on (the lowest setting). The next setting illuminates the second filament (the middle brightness). For the third setting, both filaments are illuminated. Three-Way bulbs do not work properly in standard on/off or single position sockets.