Retailers (such as Home Depot and Lowe's) are the largest market for CFL recycling since they take them for free but only from customers. Consumers purchase CFLs more frequently at these retail outlets, but fluorescent tubes are more commonly utilized in offices. CFLs are also easier to ship for recycling than tubes. While most recycling facilities will accept both types of bulbs, it is important to check the restrictions before disposing of old lamps. Industries (such as oil refineries) are another major market for recycled fluorescent tubes. These tubes can be used in new lights or in refurbished fixtures that retain their original casing. The energy savings benefit consumers by reducing their electricity bills over time. Teachers are one of the main users of recycled fluorescents. School districts across the country have begun purchasing programs where they provide CFLs for use in classrooms and other educational facilities. This reduces energy costs and helps protect the environment by eliminating the use of mercury in incandescent lamps. Libraries use a lot of light during evening hours and weekends, so they're an important user of recycled fluorescence tubes. Most libraries that use tubes do so because they save energy compared to traditional lighting methods and therefore benefit the environment. CFLs contain mercury which is toxic if not handled properly. Only use trained personnel when working with CFLs, use protective equipment such as gloves, and ensure that you don't swallow any broken glass during disposal.