I explained it already.
You understand that website is an open to the public as a write what they want. Like Wikipedia? It's not a typo. It's just a fucked up definition. Written by someone that knows enough to be dangerous. But sure, I can explain it to them, seeing you don't understand it enough to tell them. Or would you like to throw down and say you stand behind what they say now and what that now say is correct? All you need to do is Google "specific brightness" and double check you are correct. Nope, not apparent brightness.
Unit of frequency, that may be considered a typo. Is there another unit of frequency other than Hz? Huh? You know this shit don't you?
I will explain it to them. Will you agree you are saying they are correct and I am wrong? Agreeing to that might be difficult for someone with a small dick.