Supplemental black light? 385nm

[Aardvark1134]

What would a supplemental black light like this do to a reef?
Amazon product ASIN B07H8D43TK

 

[BighohoReef]

Hmmm interesting... I wonder what the effect on algae would be. Might be good for combating dinos, GHA and such instead of having to do a blackout.

 

[Aardvark1134]

Its not low enough to kill anything thats UV-C. I was thinking more floresence as many expensive lights are claiming 380-395 makes corals have more floresence.