The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

I could find the LIGHT again.
Westworld Season 3, Episode 8

Sheldon is neither sound nor LIGHT,
but he's obviously the Doppler effect.
The Big Bang Theory Season 1, Episode 6

Penny was the teacher.
When the LIGHT turned yellow...
The Big Bang Theory Season 3, Episode 16

I will ride at first LIGHT.
Game of Thrones Season 2, Episode 1

We'll leave at first LIGHT.
Westworld Season 2, Episode 5