several steps it is understood that within this general architecture other conventional elements may be included such as a low power heater to precondition the temperature of sheet 5 or a pair of pressure rollers at the output edge to more thoroughly fix the fused toner to the sheet fig2 shows a flash fuser assembly 200 according to one aspect of the present invention wherein a pair of flash units 210 and 220 are spaced apart along a sheet path p by a flash spacing s f feed roller pairs 204a 204b 205a 205b and 206a 206b are spaced along the path p to move the sheet from a printing station past the fusing assembly 200 reflective flash housings 212 222 hold the respective flash tubes 210 220 and are each directed facing toward the other on opposed sides of path p so that each unit 210 212 and 220 222 illuminates a different side of a sheet 5 travelling along the path each reflector and flash tube extends in a substantially homogeneous cross sectional shape along an axis perpendicular to the plane of the drawing and this axis corresponds to either the length or width direction of the sheet 5 for purposes of discussion the direction of travel of sheet 5.