Sunlight

Sunlight is the light that shines by the sun. It can also refer to light from any other star in the universe. Sunlight is a key factor in photosynthesis, which is vital to many species on Earth.

Yellow sunlight can give a Kryptonian amazing super powers, while red sunlight can take them away. Orange sunlight is capable of cutting a Kryptonian's power in half.

Sunlight was the only thing that could destroy the Shamonite that fell to Earth from the space cloud. Superman used a telescope reflector to reflect sunlight to the dark side of the Earth, where the effects of the shamonite were causing trouble.