Electric multiple flash arrangement

A multiple electric flash lamp array comprising a unitary structure having definable first and second regions, a first group of flash lamps in said first region and a second group of flash lamps in said second region, first and second electrical connector means forming a part of said structure and disposed in or adjacent to said first and second regions respectively, said first group of lamps being separated from said second connector means by said second region and said second group of lamps being separated from said first connector means by said first region, a first flash sequencing circuit connected between said second connector means and the lamps of said first group for causing them to flash in sequence from first to last in response to flash signals applied to said second connector means, a second flash sequencing circuit connected between said first connector means and the lamps of said second group for causing them to flash in sequence from first to last in response to flash signals applied to said first connector means, wherein the improvement comprises a first switching circuit for connecting flash signals applied to said first connector means to said second flash sequencing circuit after said last-to-flash lamp of the first group has been flashed, and a second switching circuit for connecting flash signals applied to said second connector means to said first flash sequencing circuit after said last-to-flash lamp of the second group has been flashed.