I need to connect 20 3 volt 20mA white LEDs. I am very new to electronics, but I want to connect them in a series circuit because they're spaced about 5 feet about and the whole circuit makes a circle, so I could save half the wire. I'm using a 3 volt power source (2AA batteries), but this is only temporary to see what the LEDs look like until I get a power adapter. Here's my question: I connected 5 LEDs in series to just make a mini model, and the LEDs didn't light! But when I connected them in parallel they lit up. So I did some research online and found out that to connect 20 of these 3v LEDs in a series circuit I'd need a 60 volt power source? (3 volts for each LED). I want to use my 2AA batteries because I know I can't get hurt using the 2AAs, but I don't know about 60 volts. So do I have to connect these LEDs in parallel and waste another 100 feet of wire, or is there a way to wire them in series. Or any other way to do this without using 2x the amount of wire!