So a little background on the project I'm working on. My brother is going to Tanzania in a month and I want to send him with something that can be they can use to read/do other activities at night. So, I'm using a solar panel to charge up capacitor than then power LED's. I'm using capacitors because I want something that's going to last for a really long time. Anyway, currently I'm using 7 , 5V 1 farad capacitors to power 4 LEDs (for a little over an hour). I'd love to light 10 or more 3V LED's with one capacitor (for simplicity), but I don't know what size capacitor to buy. Any suggestions would be greatly appreciated and feel free to ask question.