of the vertical portion 38 will generally correspond to the vertical dimension of the edge portion 28 of the panel 22 where the dimension of the vertical portion 38 is significantly larger than the corresponding dimension of edge 28 of the panel 22 a fiber tight seal may not be achieved whereas if the vertical portion 38 is smaller the edge cap 30 might be difficult to clip onto the edge of the panel 22 the first horizontal portion 34 need not be any wider than necessary to adequately engage the edge of the panel 22 and preferably is 1 3 times the vertical dimension of vertical portion 38 the width of horizontal portion 36 on the front of the panel 22 should be sufficient to secure the gasket 46 thereto as well as to adequately engage the edge of the panel 22 however for aesthetic reasons it is preferred that the horizontal portion 36 not extend beyond the end of the flange 18a so that the gasket 46 will not be visible from the front of the ceiling taking into consideration that there is normally a horizontal spacing typically as much as 1 4inch between the edge 28 of the panel 22 and the vertical portion 16 of the t bar in order to facilitate insertion and removal of the ceiling panel 22 in the grid opening referring now to fig2 and 8 the suspension ceiling system 10 of the present invention may also include a gasket carrying frame 60 for sealing the periphery of a light fixture 62 in a grid opening the frame 60.