Fluorescent tube lights are commonplace in commercial spaces, but also in laundry rooms and garages at home. While they do contain much less mercury than traditional CFL bulbs, they still have small amounts. Plus, as anyone who has replaced a tube light has probably witnessed, they are very easy to break. The good news is that LED technology has caught up with tube lighting. There are companies that are now creating LED tube lights that fit in the same fixtures, but have no mercury and last as much as 20 times longer. Search online to find suppliers.