Tube lights are more efficient than light bulbs.
i think I'm efficient
Efficient is normally used as an adjective
You just used the word acolytes in a sentence. Even saying, "can the word acolytes be used in a sentence", you are using that word in a sentence.
The system was more efficient and ran better than its predecessor.
The word "incidentally" can be used at the end of a sentence. You can make the sentence "This was done incidentally.".
You just used it in a sentence.
He is not a very efficient worker.
Gas central heating is more efficient than electric.Open cast mining can be more efficient than deep mines.
This is your umpteenth request for a word to be used in a sentence.
No, factor is a word that can be used in a sentence.
you just used it in a sentence
This is a simple sentence.