A discharge lamp lighting circuit includes a power supplying portion having a series resonant circuit containing transistors and a bridge driver, and a control portion for generating a control signal Sc1 to control a driving frequency of the bridge driver. The resilient member has a first end portion configured to be coupled to the support frame and a second end portion, opposite from the first end portion. A structure holds the slide in its closed position as well as in its open position. Local pass gates generate an -to-1 clock signal in response to the global clock signal, the clock high signal and the clock low signal.