Green Lantern Power Ring

"In brightest day, in blackest night,no evil shall escape my sight. Let those who worship evil's might, beware my power... Green Lantern's light!"

- Green Lantern Corps' creed

The Green Lantern Ring is one of the major aspects in DC Comics. It is worn by many warriors of the Green Lantern Corps.

History
A Green Lantern Ring, also known as a Power Ring, is a piece of jewelry that grants the wearer incredible and incomprehensible powers and abilities by harnessing willpower. They are considered by some to be the most powerful weapons in the known universe. Depending on the skill and willpower of the wearer, it can do almost anything. The first Green Lantern Ring on Earth in modern times was crafted and worn by Alan Scott and powered by the mystical Starheart. His proved to be the exception, the by-product of the efforts of the Guardians of the Universe to contain the magic of the universe. The Guardians also created the more widespread version, powered by individual Green Lantern Power Batteries through a connection to the Central Power Battery on Oa. With the exception of the ring worn by Alan Scott, the current rings are based on the one given to Kyle Rayner when he was the only Green Lantern in existence.

Oan Power Ring
In the days of the original Green Lantern Corps, the Guardian known as Meadlux created a power ring specifically for the Guardians. An Oan power ring possessed the same capabilities as a standard ring, but was fueled by the internal power of its wielder and thus did not need to be recharged. Unlike the traditional Green Lantern Ring, an Oan ring did not contain the impurity that restricted its capabilities against materials colored yellow. The revelation that such a weapon existed caused a great schism within the ranks of the Green Lantern Corps. Officers who had lost close comrades due to adversaries empowered by yellow weaponry lost faith in the Guardians, some of whom, such as Galius Zed, Eddore and Kaylark even went so far as to turn their backs on the Guardians, coveting the rings for themselves. Another group of individuals who took an interest in the Oan rings were the space pirates known as the Free Lancers.

Honor Guard Power Ring
There is no known difference in power and ability between the ring of the Honor Guard and the ring of a normal Green Lantern. Only the Honor Guard ring design is different. This was the ring first worn by Kyle Rayner when the Corps was destroyed, and was the first ring to use the new recharging protocol of only needing to be recharged when the ring is depleted. Instead of once every full planetary rotation (24 hours).

Overcharging
When in the vicinity of a Blue Lantern, or someone wielding a Blue Lantern Ring, any Green Lantern Ring can be charged to 100% and beyond. An overcharged ring allows its user to travel faster, create larger and stronger constructs, and exert incredible amounts of energy. There is no known limit to which a ring can be overcharged to, but the highest seen is 325%.

Oath
All power rings need periodic recharging. The process is not instantaneous so many Green Lanterns recite an oath while the ring charges. The oath is not required to charge the ring, but is recited to reaffirm the person's commitment to the Green Lantern Corps, and to measure the time it takes the ring to charge. While many Green Lanterns create their own oath, the majority use the Corps' official oath as a sign of respect. In the interests of political correctness on the part of DC (or, in context, Hal Jordan), the word "blackest" was replaced by "darkest"; this practice has been abandoned with the reinstating of the Green Lantern Corps due in part to the significance of the Blackest Night comic event. Rot Lop Fan, a Green Lantern from a starless sector, replaces sound with light in his oath.