yelling and redirecting others ot another post often will get you overlooked, and it has only been 1.5 hrs since you opened this thread, so be patient, you should get some answers
now:
the colors are good, they are mostly coraline algae(you may loose some, and it wil turn white)but it willl regrow
as for how long you shouldeave it in the tank, b4.........., until you have no ammonia or nitrAtes, i would with MO'ed lr, cure it in another container, b4 adding it now, if you already have fish in there, often with mo, you still have die off
the lightin for lr, is kinda insignificant, it is more the life you wish to have and keep, if you are going to have a fowlr, then, i like pc lighting, it gives off good light and really compliments your fish
other than that, listen to mh, and add another poweerhead
HTH and good luck