The 1/28 DD Pro is now obsolete, you can alternatively use the dimmable version found here: Tridonic 1/28 TC DD ECO The Tridonic PC 1/28 DD PRO is a non-dimmable high frequency ballast to run: 1 x 28 Watt 2D/PL-Q 4pin Lamp. This product is obsolete, but we still have some UK stock. Hurry while these are still available.
Manufacturers Part No (where applicable) : 89800004
This Tridonic product is available for just £18.60
at LampShopOnline Ltd