Very well. If you wish to insert the word "specialized" at the syntactically appropriate place in the following sentence, I'll offer no objection
Please, Sear, we were talking about grocery bags and other commonly used items around the household, not items such as gasoline and pesticides which are only utilized in a rather narrow category.
If we really need to start breaking down every single statement into it's constitute forms and how it relates to other statements broken down in the same manner this conversation can go nowhere.
When it comes to carbon arc lighting, are you very sure that projectors utilize that form of lighting today? Seems to me that such lighting is no longer in use, but I could, as always, be mistaken.

Fiery Red