Sunshine is a unique power, a blessing unlike any other. It is at its weakest at midnight and its power peaks at noon. Starting from sunrise, the afflicted's power begins to increase and grow larger as their personality changes from a submissive night-self to an arrogant daytime-self, with this process presumably reversing with the setting of the sun. In the daytime, their physical strength increases dramatically and they are able to radiate intense waves of light and heat easily capable of melting metal and vaporizing stone. Some hearken this power to that of the actual sun.
With all this being said, the true power of Sunshine can only be used when the afflicted stands within the sun's light or can feel the sun's energy (through the ground or in a building). Sunshine cannot be used at night or if magically suppressed.
Mid-day draws the most energy to the afflicted, allowing them to become "The Supreme" for one minute or one combat round.