Diffusing LED lights greatly helps blend the overall spectrum into one cohesive light source. Traditionally aquarium LEDs have used optics to increase the penetration of the light, but doing so actually makes each LED into its own little spotlight, making it harder for colors to blend. With the overall amount of light available in modern reef tank LEDs, more power is not exactly the best thing, and throughout our testing, we have found that evenly spread light that is blended properly is more important for coral health and growth.