I don't have a back up light in case the light that I have goes out - in that regard, I"m wondering if it's good insurance to have an extra light fixture as a standby? Is that a crazy idea?
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I agree with this post in regards to tanks not needing a light immediately as there are stormy days/weeks on reefs where there is minimal light for the corals.Tanks can go a couple days with just ambient light, while you ordered a new light.
Or... if you find a nice backup, similar light for a great price used, then maybe it's worth having one?
Idk, I think I would just use the broken light as an excuse to upgrade lol, and having a mediocre backup light waiting kind of defeats that purpose.

