The lights are not only placed in the pool itself, even the pool side has dome shape light bulbs
As such, when the lights were finally turned on, they shone on both Azarel and Evren's body
Azarel want to curse after that. He doesn't know whether someone out there was playing with him but the lights has to be red at that moment
The pool lights can be change manually or automatically. Most of the time, as long as the lights were turned on, it would periodically change in color
Azarel doesn't know why as soon as they were turned on, the color has to be red that is already almost pink
Whether it be red or pink, both of thise colors could be associated with romantic love
As such, although the two of them don't plan on not continuing their kiss, because of the lights around them, the scene has become quite romantic