Hal Jordan is the most well known Green Lantern in the DC Universe.
The first Green Lantern was Hal's father Martin Jordan. Hal became the Green Lantern when an alien named Abin Sur crash landed on earth and used his ring to search for someone who was "utterly honest and born without fear". With the ring, he can make almsot everything he imagines. He is known as the strongest of the Green Lanterns.