Botswana Exports of thermionic, cold cathode or photo-cathode valves and tubes to Malawi was US$8.93 Thousand during 2019, according to the United Nations COMTRADE database on international trade. Botswana Exports of thermionic, cold cathode or photo-cathode valves and tubes to Malawi - data, historical chart and statistics - was last updated on May of 2024.