So you are looking for a pair of geeky earrings that stand out? These Blinking LED Skull Earrings are worth a look. Each skull has two red LED lights connected to 4 tiny solar cells, measuring 3/4″ wide by 1″ tall each. The battery lasts up to 90 minutes in darkness.
LumenJewelry is selling these on Etsy. More info is available here.