Tridonic PC 2/26/32 TCT PRO is a non-dimmable high frequency ballast to run: 2 x 18 Watt long single turn compact fluorescent lamps 2 x 24 Watt long single turn compact fluorescent lamps OR 2 x 26 Watt double turn compact fluorescent lamps OR 2 x 26 Watt triple turn compact fluorescent lamps 2 x 32 Watt triple turn compact fluorescent lamps OR 2 x 22 Watt T5 circular fluorescent tubes.