Swaziland Exports of thermionic, cold cathode or photo-cathode valves and tubes to Botswana was US$40 during 2010, according to the United Nations COMTRADE database on international trade. Swaziland Exports of thermionic, cold cathode or photo-cathode valves and tubes to Botswana - data, historical chart and statistics - was last updated on February of 2026.