The light from the sun is blinding, so please close the curtains.
In the moonlight, your teeth look just like pearls, Kanae.
There is still a slight glimmer of hope left for your child who was lost in North Korea.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
You have a ton of sunlight where you live. This creates heat. With this sunlight heat you're able to make your favorite food in the world: hickory (ひかり) smoked bacon. Mmm, taste that delicious bacon.