Egeria densa is the scientific name I believe.
I used to grow it under 3.75 & 2.5 wpg with no problems (don't anymore, it grew way too fast). Its a nutrient hog so good to prevent algae especially when starting an aquarium. I've never had it turn brown on me except when I put it in a fry grow-out tank that had less than 1 wpg. When I researched it, the literature I found was that the brown section was being shaded too much.
Perhaps I had a different variety, but mine never turned red at all, even floating under the highest lighting I have.