Just curious because i have noticed a few very small feather dusters on my live rock. They must have come on it and made it through the cycling process. How much light do i need to keep them alive? Right now i have a coralife 260W PC fixture on the tank.(it's a 120g) I know these lights aren't strong enough for corals or anemones in a tank this size, but it is a FOWLR and i had the light left from my old 75g so i put it to use. Will this amount of light be enough to keep the dusters alive??