I appreciate the replies. I think I will get some corrosionX for sure.
blearning, Why are you suspicious of the tin can thing? All it really boils down to is a simple mechanism to keep the connectors dry.
Actually they make weatherproofing devices for outdoor connections, very expensive for our use. It is similar to heat shrink but has some other properties as well. In telecom we use a greased crimp connector which is very effective (referred to a penny). I never tried it on lights and wont. SMILE
Second inverting a container above the cooler ground makes a condenser, BOY scouts fresh water maker, it really doesn't matter what it is, tin, plastic, wood.
The principle is very basic, the container setting above the ground gets warmed in the ambient air, the cooler damp air from the ground condenses on the container. It is a pretty amazing thing for the first time. Northern climates it will freeze as it condensates and is good to make cold drinks with. If the container is clean.
a quick way to see it ... turn one of your empty totes upside down ... wait 10 to 20 minutes and check it ... it will be damp inside.
solar desalination ... *SMILE*