No, No it's not. Sun needs to be 100% gone for the lagoon show, cause projections.
Also, please consider they probably want to use this show to extend time spent in the park, They don't want you wrapping up your day at 9pm. The show times are literally perfect for extending stays. Say you miss the 10 because you're in line for a maze, you wait another hour.
It makes technical sense (Absolutely 0 chance of sun), and it makes business sense (guest spending more time in park).