Not every light that pleases the eye is necessarily good for your corals, which is why the ReefBeat App checks your light settings and ensures that you have not exceeded the recommended daily exposure.
Corals cannot utilize the full sun spectrum. Light above 480 nm (greens, yellows, reds) can potentially harm the corals as it generates excess heat, promote toxic oxygen radicals, and damages the symbiotic Zooxanthellae algae.