I think it's funnier that you have an illuminated filter then the fact you didn't notice it. that's just ridiculous.
"come over and check out my new setup!"
"did you get a bigger tank?"
"no"
"did you get some new fish?"
"no"
"maybe some shrimp or cool looking snails?"
"no"
"then what am I coming over for?"
"we can now enjoy the sight of fish poo getting caught in my filter media! it's illuminated!"
"why are we friends again?"