fig2 as a further example the height h 2 and its corresponding depth d 2 corresponds to the distance between surface 108 and 112 of vehicle panel 107 metal or otherwise such as part of a vehicle shown in fig2 tabs 88 and 90 are deflectable inwardly during installation to permit easy snapping of lamp assembly 50 into position on a vehicle or trailer after being mounted tabs 88 and or 90 snap back into the illustrated configuration and block removal of lamp assembly 50 through the mounting hole in the vehicle or trailer referring again to fig2 lamp assembly 50 is illustrated installed through vehicle panel 100 as illustrated vehicle panel 100 includes outer surface 102 opening 104 and inner surface 106 lamp assembly 50 is inserted through opening 104 which biases tabs 88 and 90 inwardly to clear opening 104 once tabs 88 clear opening 104 they spring back into the illustrated configuration and abut inner surface 106 attempts to pull lamp assembly 50 out of opening 104 are resisted by tabs 88 abutting inner surface 106 grommet skirt 54 rests on outer surface 102 and obscures opening 104 referring now to fig2 lamp assembly 50 is illustrated installed through vehicle panel 106 vehicle panel 106 is substantially thicker than vehicle panel 100 and includes outer surface 108 opening 110 and inner surface 112 lamp assembly 50 is inserted through opening 110 which biases tabs 88 and 90 inwardly to clear opening 110 once tabs 90 clear opening 110 they spring back into the illustrated configuration and abut inner surface 112 attempts to pull lamp.