is achieved by providing more surface contact and therefore better adhesion between the two materials while also creating a more difficult path for moisture to enter the module should the adhesion fail at any point along the surfaces another embodiment of the led module is shown in fig5 in which the channel 16 serving as a vent is placed at the side of the cover 11 the cover for this purpose has a continuation 21 which preferably extends away from a central portion thereof in a radial direction and which preferably extends along a portion of the support 3 the continuation defines the channel 16 which is formed relative to the support 3 as shown the continuation is entirely enclosed within and covered by a sealing mass or layer 14 as discussed above a cylindrical boss 22 extends from the end of the continuation 21 and has an upper end which protrudes out of the sealing layer 14 the continuation 21 and the boss 22 together form the vent device 15 in this embodiment of the led module assembly the channel 16 extends through the cylindrical boss and out through the top of the boss and thus out of the led module assembly as desired the channel 16 can be open fully closed or closed by means of the plastic material 17 placed in the channel as shown in fig6 a plurality of led components 2 a 2 b and their respective covers 11 a 11 b thereof can also be vented with through a common vent device 15 the bosses 22 can be connected via separate continuations 21 a 21 b to two or more covers 11 a 11 b in which channels 16 a 16 b connect to the common hole in the boss.