(previous post) New shipment arrived: two power supplies rated 3.3V @ 3A and power cord receptacles. The power supply is yet another challenge - the flashlights' bulbs work at 1.2-1.5V and it is not that easy to find such a power supply, Apparently I will have to connect few bulbs in series:
Plumbing parts are absolutely indispansable - these are 1/2 x 3/8 coupling reducers. I am planning to use them for mounting flashlights on the tips of the flexible pipes:

The copper plumbing parts are firmly pressed into plastic pieces, nice and clean:

(next post)