ATX FD Series Cylindrical Fluorescent Luminaires can be installed in hazardous areas designated as Zone 1 and 2 ‑ 21 and 22. Their flameproof design and high degree of corrosion resistance makes them an ideal fixture for use in indoor or outdoor areas that are exposed to dirt, water, moisture and corrosive conditions. They are available as standard duty or with emergency battery back‑up.