No longer are you limited to using a fixed amount of power per channel, the HD dynamically adjusts power available to each color, borrowing power from the colors you're not utilizing. Giving you the most vivid spectrum your tank has ever seen. Check out the PAR difference between a normal 20K color setting and one with HD enabled. Ai Prime HD - 100 PAR generation 1 AI Prime LED - 64 PAR HD spectrum the Prime HD Series is capable of producing a limitless number of spectral combinations to fit your tank's exacting needs. Simple built-in control the Prime hdtm includes Wi-Fi control standard. Use the My a I app on any iOS or Android device to easily set up or program one or multiple AI Prime hds. Don't have a smartphone? any Wi-Fi enabled Mac or pc will work. Power output with a spread of 24" x 24", the AI Prime HD has a peak PAR of 100mol at a depth of 24 inches, more than enough for your hungriest of livestock. Drawing a maximum of 55 watts from the wall, it follows in the family's efficient footsteps. Optics the AI Prime HD comes standard with 80 degree lenses giving you the best balance of power and spread. Our lens optics are custom designed, boasting greater than 90% optical efficiency and including a diffuse exit surface to provide improved color blending. LEDs the AI Prime HD utilizes the latest LED technology from leading manufacturers, arranged to provide the best performance. 3 - Cree XP-G2 cool white (> 70 CRI) 3 - Cree XT-E Royal blue 3 - Cree XP-E2 blue 1 - Cree deep red 660Nm 1 - Cree XP-E2 green 1 - SemiLED 415Nm 1 - SemiLED 400Nm.