Sounds complicated, perhaps a photo resistor would time things in to natural light ... perhaps water temp should change to hot at 2 pm and cold at 2 am.
A 12v car bat, a timer or photo resistor... transistors for the LEDs.
But thats just because I dont know what you are talking about.

Hi, I have 100 2.5w 6v crystaline solar panels ... ( dare I say for sale, perhaps I should re-read the rules) I plan to put them on fleabay but want to include a diode...
What size diode? what component number etc?
Any one have any idea?

Tar & stuff!