Thread:BunsenH/@comment-25404524-20170107010430/@comment-26971439-20170107045219

It would be impossible to make a pure black light however you can come pretty close, what I did to make me darker glowbes used on my plant island was combined orange and blue glowbes over and over until I was content with how dark it was. that is asuming this is what you mean by black glowbe.