Reef Central Online Community - View Single Post - Chinese black box, how bright should it be.

Ron Reefman · 11/15/2015, 02:55 PM

Brightness is absolutely no indication of PAR. Our eyes and coral 'see' light very differently. In order to get a real safe way to tell, you need to borrow a PAR meter from somebody.

Or just start very low and slowly work the power levels up over weeks until you are happy or you bleach a coral.

11/15/2015, 02:55 PM	#2
Ron Reefman Registered Member Join Date: Jul 2009 Location: Cape Coral, FL Posts: 10,431	Brightness is absolutely no indication of PAR. Our eyes and coral 'see' light very differently. In order to get a real safe way to tell, you need to borrow a PAR meter from somebody. Or just start very low and slowly work the power levels up over weeks until you are happy or you bleach a coral. __________________ The good thing about science is that it's true whether or not you believe in it. (Neil deGrasse Tyson) Visit my build thread http://www.reefcentral.com/forums/showthread.php?t=2593017