The Slight Diffusion Optical Kit greatly enhances the already great color blending capability of the AP700 while helping maintain the natural light appearance while reducing hard shadow and light scatter. Have you ever wanted your AP700 to be a bit softer light, with less appearing shadows, almost mirroring a T5 lamp? The Optical Kits are the answer. Having the ability to change the overall diffusion of the LED lights within your fixture is very valuable. Diffusion optics have been used in the lighting industry for years, it's about time we use them with aquariums. Features: Perfect for acclimation Reduces hard shadows Reduces light scatter Softens source of light Easy magnetic install Under 10% loss of overall light