You should be able to dial that light in to fit your needs but there are certainly cheaper options that will grow hardy plants. And you could get a timer that would allow on/off periods that suit your schedule. But feedback here and elsewhere has been pretty glowing for the 3.0. As for sizing, I'd go with the 48", but might want to check with Fluval first or Google the actual length. I only suggest against buying a shorter one because I'm not fan of having a light delicately suspended over a tank with long metal rods on each side. Especially if used over open water.
Nothing good happens fast in an ecosystem.
Last edited by Blue Ridge Reef; 09-11-2019 at 06:27 PM.