of red dye and is therefore less blue this theory of operation is not part of the invention but is simply a theory trying to explain the discovery a lamp constructed in accordance with the invention produces light represented by the solid curve illustrated in fig3 as can be seen the emission curve matches the filter curves in fig1 very well in particular the brightness of the red is more than doubled attempting to produce this result by adding more red dye without using a brightness enhancing film would only reduce the blue peak and the green peak and not achieve the result fig4 is a cie chromaticity diagram including the color coordinates of the three emission peaks from an el lamp constructed in accordance with the invention as filtered by a display backlit by the lamp the three peaks are interconnected by lines to form a triangle the interior of the triangle shows the colors obtainable from the display the open circle is the white point of the el lamp alone the curve adjacent the white point is the black body radiation curve the location of the white point indicates that the lamp is bluish white as measured but appears a neutral white to an unaided human eye fig5 is a cross section of an light source constructed in accordance with a preferred embodiment of the invention using an el lamp as the primary light source in none of the figures are the several layers shown in proportion or to scale el lamp 10 includes transparent substrate 11 of polyester or polycarbonate material.