I ALWAYS KEEP THIS TYPE OF INFO HANDY TO SHOW THE POWER OF A GREEN LANTERN.
Sodam Yat
Powers and abilities
Like their Kryptonian cousins, the Daxamites gain a large number of abilities when exposed to yellow sunlight including super strength; flight; super speed; super hearing; X-ray, heat, microscopic, and telescopic vision; and super breath. While the Daxamites are invulnerable while under yellow sunlight, the substance lead is still very lethal to them even in small quantities, as Kryptonite is to Kryptonians
Ion powers
The benevolent Ion entity bestows its host with powers similar to a Green Lantern Corps Power Ring and the Starheart. With those powers, Sodam Yat has been described by some as the most powerful superhero in the universe. However, access to the powers can be controlled through his power ring, which he is required to wear constantly, allowing the Guardians of the Universe to shut off his Ion powers. In the Legion of Three Worlds miniseries, it is revealed that being host to the Ion entity has allowed Sodam to survive, unaging, into the 31st century.
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Kyle Rayner
Ion
For a brief period, Rayner achieved godhood as Ion after absorbing the energy Hal Jordan had left in Earth's Sun during "The Final Night" storyline, which had merged and grown with energies released after Oblivion's defeat. With his new powers, Rayner could bend time, space and reality, allowing himself, for example, to be in many places at once. The drawback of being one with everything was that Rayner could no longer sleep or separate himself from the overwhelming responsibilities these abilities imposed upon him. Rather than sacrifice his humanity, Rayner abandoned omnipotence, bleeding off the vast power, recharging the Central Power Battery on the Guardians' home planet and headquarters, Oa, and helping to create a new group of Guardians in the process. Before he purged all of the power, though, he modified his ring and conjured a new Corps uniform to reflect his new maturity. Once again limited only by his willpower and imagination, Rayner's ring could still affect yellow, and would always harbor a lifeline of power without a time limit on its power, and is keyed directly to him, and would always return to him, though it still required charging to reach full power.
John Stewart as the mortal Guardian of the Universe, Master Builder
John finally forgave himself for his past mistakes and grew into a stronger, more complex hero when he became the caretaker of the "Mosaic World", a patchwork of communities from multiple planets that had been brought to Oa by an insane Guardian who had invaded John’s mind. Although bitter and sullen at his assignment at first, he overcame this and, using his formidable intellect and talent for unconventional thinking, Stewart forged the Mosaic into a new society and eventually became the first mortal Guardian of the Universe, known as the Master Builder.
Hal jordan.