Starring: Melissa Benoist, Russell Tovey, Jason Mitchell, Carlos Valdes
Earth X is of a different Universe where the Nazis won WWII. In present time, a group of super powered Freedom Fighters led by The Ray fight back. But when Red Tornado is taken out and his cortex compromised, a wounded The Ray fleas with the cortex to another universe, Earth 1 which is the home of the Arrowverse.
The Ray finds his Earth 1 counterpart and bestows onto him his powers and gives him Red Tornado's cortex before he dies, leading Earth 1 Ray Terrill to dawn the superhero identity of The Ray. He learns his new powers while struggling with his love life and how to come out to his parents that he is gay, when the Nazi version of Supergirl called Overgirl tracks the cortex down on Earth.
Continuity mistake: Back at the bar, the table to the right of Ray and John where Ray's future boyfriend, Jacob, is sitting has a light sitting on it. The light is right in the center of the table. Then after John points to them guy sat that table and it shows them from a different angle, the light is suddenly closer to the edge and towards the right. (00:25:30)
Answer: My understanding is the Ray uses pure light for his powers while Superman and Supergirl get their power from the solar energy of a yellow sun, not yellow light.
Bishop73
I see. But if it was from pure light, wouldn't his powers have a white glow and not a yellow glow?
Quantom X ★
Most likely just a styling choice. I just know the basics details of his powers and not sure why it comes out yellow (or if it's even stated.) Perhaps for the the same reason the sun appears yellow, short wavelength light becomes scattered.
Bishop73