LOL! Yeah, sorry. . . more specifics, it worked for ME in my10g - but I have the 2 screw-in type bulbs. It also did well in my 5g tall. . . I pretty much have found that in lower lighting it grows very thin and more leggy, while what I see in your tank is how it behaves when it's grown under very bright lighting. So I think it prefers the brighter light, but does okay in dimmer conditions. It can also float, but I've found that it has a very thick stalk while in its higher-lighting form. If the light is too dim for it, it turns into something a *bit* more like Hornwort, stem-wise.
if ANY of that made sense, lol! Sorry - I'm half-asleep!