ceastman Posted January 12, 2016 Share Posted January 12, 2016 Should the natural sunlight that hits my tank be brighter than my tank lights? I can put my hand in front of the sun and see a shadow in my tank. Does this mean my tank lights are set too dim? Quote Link to comment Share on other sites More sharing options...
victoly Posted January 12, 2016 Share Posted January 12, 2016 It would probably be better to be more quantitative than the brightness that human eyes can detect. If you're happy with your growth and inhabitant health, i say dont mess with it. If you're not, use a PAR meter and adjust your lights accordingly. Quote Link to comment Share on other sites More sharing options...
jestep Posted January 12, 2016 Share Posted January 12, 2016 ^this Speaking personally, allowing uncontrolled sunlight is usually a great recipe for creating a lot of algae. The times I've seen it work successfully are when the sunlight is controlled such as using solar tubes with the ability to diffuse the output. Also, because sunlight has a much wider and redder spectrum, it almost always requires substantial actinic or blue led's to get the crisp white look that most people want in their reef tanks. Quote Link to comment Share on other sites More sharing options...
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