[Aqua Pro Builder]

1)Align the LEDs along a straight edge
Tape the other side of the LED so that the legs are still exposed for later soldering

2)LEDs connected by solder alone without help of any wires. Then apply heat glue on the back of the LED to strengthen the structure. Use water resistant and heat resistant glue is a better choice. I used heat glue only because they are around next to me and I know, from experience, this final product would not produce strong heat.

3)Connect wires to the power supply. try to follow color coding custom. Gold, red and a wire with strong marking printed as positive and silver, white, black and plain without markings wire as negative. Note: the cut corner of the LED means negative. Check the LED tester diagram when I finish posting. If you are using the more common 3mm and 5mm LED the shorter leg is the negative.
Pic shown finished product for fresh water application, make sure if you are using it for SW, all metal must be sealed!!!

4)Spy light in action in a saltware tank

5)Closeup of spy in action. I will try to take a pic with some animal moving around when it happens.