Every Flex II propagation bar needs a driver, and this 150 watt unit handles a sizeable string. It will run up to 15 Flex II 10, seven Flex II 20 or five Flex II 25 lights from a single feed. That covers most small rack systems in one go.
It accepts mains input from 100 to 240 volts, so it works straight from a UK socket. A 1 year warranty applies.