phosphor is capable of absorbing a portion of the green emission and converting it to a red emission which peaks at about 615 nm the remainder of the green emission will combine with the red emission to produce an overall yellow emission when the phosphors are blended in the correct proportions similarly in fig2 the green emission of the zns cu cl phosphor is overlaid on the absorption and emission curves of a sr ca si 5 n 8 eu phosphor again the green emission of the el phosphor falls in a region of relatively strong absorption for the sr ca si 5 n 8 eu phosphor which exhibits a peak emission at about 600 nm thus a yellow emission may be obtained from these phosphors when they are blended in the correct proportions a green emitting zns cu cl phosphor osram sylvania type 728 and a red emitting sr ca s eu phosphor where coated with a hydrolzyed trimethylaluminum tma coating in accordance with u s pat no 5 220 243 several blends of these phosphors were prepared by adding various amounts of the phosphors to a plastic bottle and blending on a paint shaker for twenty minutes the amount of the coated sr ca s eu phosphor varied from 4 to 15 by weight the remainder of the blend consisted of the coated green emitting el phosphor test lamps having a conventional thick film construction were made with the phosphor blends and operated at 100v 400 hz the results of the lamp tests are given in the table the x y.