Here is a review of the new ecotech radion diffusers. I am running 3 x gen 3 XR15 lights on my redsea reefer 250. Here i compare the optical performance of the standard 80 degree lenses + diffuser with the 120 degree wide angle lenses that i had on my lights.
Also check part 2 of the review here
See the links at the end of the video for how my lights are setup.