Lightbox MouseOut

[debra]

I’ve read all the posts and tried for days now, but still stuck. Can anyone help me with the mouseOut functionality of the mega menu that appears on my homepage by mouse over the button18_mouseIn_1 ? It appears beautifully, but only disappears by clicking the x.
The coding below sits on the

import window from 'wix-window'; 

export function button18_mouseIn_1(event) {
  window.openLightbox('Promo'); 
}

export function button18_mouseOut(event) {
  window.lightbox.close();
}

Many thanks!