Lol funny. All my past experience with mh lighting was for my reef aquriums when i was in that hobby $$$$$. We used 10,000k, 14,000k and my favorite 20,000k DE and SE 250w and 400w. Now 20,000k mh is very blue, even to the eye. 6500k mh bulbs are use for large fresh water planted aquriums and i...