This circuit is delay off timer for car ceiling light , can be used both orginal lamp or LED light. The timer can be adjust by POT on board.

In case, LED Lamp, delay time is very short  2-5 seconds, please refer to below video.
and 7-14 seconds for normal lamp ,  Not over 12W

Comes with 30cm wires ( Red / Black )

PCB size : 3cm x 3.2cm x ( Thickness 2cm )  Very easy to install only 2 wires to car ceiling switch. Please refer to below images / Video. How it works?