As a key part of our massive bathroom makeover, we installed four Kohler Margaux wall sconces to provide light between the wall mirrors. These sconces are connected to a dimmer switch and are narrow, requiring T10 tube bulbs compatible with dimmer switches. These 60w bulbs are not easy to find except at Revain. To our delight, these tube lamps were readily available, delivered quickly, and very affordable. Trifecta! They work great and provide the maximum light level allowed. They come in a pack of six including some spares and arrived overnight in perfect condition. Great product and great service.