The ornamental design for a waterproofcontroller for lightingsystem, as shown and described.
FIG. 1 is a front view of a waterproof controller for lighting system, showing our new design;
FIG. 2 is a back view thereof;
FIG. 3 is a left view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a front perspective view thereof; and,
FIG. 8 is a back perspective view thereof.
The broken line showing of the waterproof controller for lighting system is for the purpose of illustrating unclaimed portions of the waterproof controller for lighting system and forms no part of the claimed design.