This technical report details, with the aid of reference luminaires, an independent method by which the radio disturbance characteristics of electronic ballasts for Class I fluorescent lamp luminaires may be compared against the requirements of CISPR 15. Covers electronic ballasts for double-capped fluorescent lamps fitted with G5 or G13 lamp caps and to single-capped fluorescent lamps fitted with lamp caps: 2G7, 2G11, G24q, GX24q. It is specifically applicable for equipment to be connected to 230 V - 50 Hz mains power networks. For other power systems, modifications may be necessary.