Since the sun introduces ultraviolet rays, that are harmful (minus plants and other organisms that can harness the energy), entropy should increase over time.
that's a great mix of bullshit. The Sun produces the vast majority of its output in the visible range - that's why it's visible! Much of the UV is filtered out as we well know.
The important point is that the Sun's energy arrives in the visible and is re-radiated in the infrared. That means there's a hell of a lot more photons radiated by the Earth than arrive on the Earth from the Sun. The emitted photons carry away many more degrees of freedom than arrive and so the local entropy decrease apparent in Evolution is miniscule compared to overall entropy increase.
The "low entropy" photons enter the life-cycle through photosynthesis, and thus help drive the whole process of evolution. Simple.