Kourtney Kardashian’s nighttime swim was lit … by her bikini, that is.

The reality star, 42, went for a dip in the dark, sharing photos of herself literally glowing in a thong bikini on Wednesday.

"Life is but a dream," she captioned a series of poolside snaps, with her teeny white-hot two-piece lighting up the night as she struck several poses on the pool deck and in the water, perhaps under a black light.

TRAVIS BARKER'S DAUGHTER REFERS TO KOURTNEY KARDASHIAN AS HER ‘STEPMOM’

Followers were dazzled by the luminescent look, with one dubbing her a "flawless mermaid," while another commented, "glowing as always."

Perhaps it’s love that has Kardashian shining: Things have been heating up with her boyfriend Travis Barker this summer, with the pair frequently packing on PDA.

But while the star sported bridal Minnie Mouse ears at Disneyland and is called "stepmom" by Barker’s daughter, sources close to the couple told Page Six they are not engaged yet. 

It’s not the first time the Poosh founder has made waves with her steamy snaps, as she was praised for posting an unedited bikini photo earlier in the summer.

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The Kardashians are used to being in the limelight for their swimsuit snaps, having inspired several swimwear trends this summer alone, ranging from velour to underboob-baring styles.

With the family frequently swapping style cues, perhaps her latest photo will have her sisters seeing the light on glow-in-the-dark swimwear.

Click here to read more on the New York Post.