A photo-timer module, including a upper cover which has a hollow window; a lower
cover which could affix to said upper cover; a control and power circuit which
is placed into said upper cover, wherein a portion of said control and power circuit
is revealed in said hollow window, said control and power circuit has a plurality
of input pins and a plurality of output pins wherein the plurality of input pins
and the plurality of output pins are stretching out of said lower cover; a mask
plate placing above said hollow window comprises at lease one hole thereon, so
that a portion of said control and power circuit is revealed in said hollow window,
and a transparent plate placing above said mask plate is used for protecting and
convenient observing said control and power circuit. After assembly, said control
and power circuit could control a power on or off by sensing variation of a light
and show the status on said hollow window.