You can test your LEDs and cook your hot dog at the same time with this LED tester! It's easy: All you need is a power cord, two forks, and two bolts to hold the hot and neutral wires on the forks. Stick the LED's that you want to test in the hot dog before you plug it in. They must be oriented with the leads facing the two ends of the hot dog. If they are oriented opposite the hot dog, then no current will flow through the LEDs. You can "test" as many LEDs as you can fit into the hot dog at the same time. Once you've got the LEDs arraigned, stick the forks in each end of the hot dog and plug it in. It takes about 2 minutes for the hot dog to be fully cooked at 120 volts. Your LEDs will light right up!

Warning: On a serious note, this is dangerous. Don't touch the hot dog, the LEDs, the forks or the bun while the hot dog tester is plugged in. It's wise to set something heavy on the cord so you won't trip on it and pull the hot forks on the floor.