A fluorescent light source includes a twin tube fluorescent lamp having first and second electrodes at or near the ends thereof for capacitive coupling of RF electrical energy to a low pressure discharge within the fluorescent lamp and a RF source having a first output lead electrically coupled to the...http://www.google.com.au/patents/US5289085?utm_source=gb-gplus-sharePatent US5289085 - Capacitively driven RF light source having notched electrode for improved starting
