What happens next?

How to fish wires through a conduit or pipe
Unwind several feet of the light string and feed a little bit of it into one end of the pipe.
Start up the vacuum cleaner and attach it to the other end of the pipe.
Try to seal the connection the best you can to make the most efficient use of the vacuum.

OPTIONS:
(1). Tighten the connections by adding wires to the plugs. Place the wires in their specific holes, lined with them into the pipe.
(2). Bring the light close to the conduit at one end and turn the pipe clockwise to make contact with the conduit, then pull it all the way back. Then, finish about halfway up the length of the pipe without stopping.
(3). The vacuum should pull the string through the pipe.. Watch the end where the string is feeding into the pipe to make sure it doesn't get snagged and stop.
(4). Set up your filter and pump connections. When you set up the pump connections, drain the water into a bucket or other container.
(3).