12 mounted thereon with a lock assembly 14 immediately thereabove positioned above the lock assembly 14 is an illuminating device 16 according to the invention the device 16 being surface mounted to the door 10 in a position for illuminating both the doorknob 12 and lock assembly 14 to facilitate entry in subdued light in some instances the lock assembly 14 may be positioned below the doorknob 12 and in those instances the illuminating device 16 may be positioned therebelow with the lens portion 18 of the illuminating device 16 pointed upwardly to illuminate the doorknob 12 and lock assembly 14 referring also to fig2 and 3 the illuminating device 16 includes a frusto conico housing 20 which has an open bottom 22 and an integrally formed pressure plate portion 24 of a reduced fitness to permit deformation upon the application of pressure to energize the electronics in a manner to be hereinafter discussed as best illustrated in fig3 the pressure plate portion 24 is of an inverted dish shaped configuration circular in plan view and having a relatively large diameter contrasted to the overall diameter of the housing 20 with this configuration a relatively broad area is provided as the switch means which can be readily found in subdued light or in the dark furthermore even with both hands occupied by the occupant of the premises the pressure plate portion 24 can be easily deformed to activate the electronics by use of an elbow a clenched fist which may be holding other things or the like while the pressure plate portion 24 may be formed.