This is the 13579th most frequent Russian word.
неадекватном
"Неадекватном" means "inadequate" or "inappropriate" in English.
Here, "неадекватно" describes the behavior as being inappropriate or unreasonable for the given situation.
Он вел себя очень неадекватно на встрече.
He behaved very inadequately during the meeting.
In this sentence, "неадекватными" refers to responses that are disproportionate, inappropriate, or unreasonable in the context of criticism.
Этот человек обладает неадекватными реакциями на критику.
This person has inadequate reactions to criticism.
Here, "неадекватное" is used to denote insufficient or lacking enough quality, applied to lighting as the subject.