July 29, 2021 | 12:28pm

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.

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.

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Kourtney Kardashian took a dip in her glow-in-the-dark swimsuit

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The Poosh founder showed off her famous figure in the thong bikini.

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The star dipped a toe in the pool while modeling the luminescent look.

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She also lounged on the pool deck for photos.

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Kardashian looked out at the pool as her bikini radiated light.

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She shrugged at the camera in her light-up swimsuit.

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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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Kourtney Kardashian lit up the night with her white thong bikini.
Getty Images; Instagram

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.