Abstract: There is provided an apparatus for pulse charging of a load capacitor, the apparatus comprising: a ferrous cored transformer having a primary winding and a secondary winding; a primary circuit connected to the primary winding; a secondary circuit connected to the secondary winding, the secondary circuit comprising the load capacitor; and an uncoupled inductance in the primary circuit or the secondary circuit, the uncoupled inductance reducing the coupling coefficient between the primary circuit and the secondary circuit.

Abstract: There is disclosed a flash device for selective activation where upon activation the device may emit at least 100,000 lumens, the flash device comprising, an operator interface, a power unit comprising an energy store, at least one light emission unit connected to the power unit and comprising an array of light emitting elements, a power converter unit for driving the array, a control unit operably connected to the at least one light emission unit, the control unit comprising a processor and being operably connected to the operator interface.