Solar energy (or Sun energy) is radiant energy emitted by the sun. Rajh <Construct of the Sun> oversees the energies that have both sparked life and snuffed it out in an untold number of his kin. Considered the mightiest of his fellow constructs, Rajh holds the power to unleash the fury of a thousand suns upon Azeroth.
Druids have access to solar spells such as:
Tauren Seers and Sunwalkers
The Sunwalkers are an order of tauren paladins and Seers ale priests. They were founded by Aponi Brightmane after a series of theological discussions with Tahu Sagewind about the importance of balancing out the night-elven focus on moon-worship through reverence of light as part of their worship of the Earth Mother. As such, the Sunwalkers are warriors who wield the power of An'she as they did in the past, the sun in tauren mythology.