I assembled this Galaxy Explorer a few years ago and really enjoyed the process. I dusted it off after Tom dropped by with this kit is from Lightailing to give it LED sparkle.
The kit comes with a battery pack, bundle of LEDs and a nicely designed and printed instruction book on how to take it apart and add said lights. There’s also a link to a YouTube video which proved quite handy for a few bits. The wires connecting all the lights are super thin and mostly tucked in between pieces and not visible. I may have been a little sloppy.
Whole thing took about 45 minutes and I was amazed at the transformation, particularly the siren effect side lights that came on a plastic disk so thin, it snapped between the existing Lego pieces.
Now I’m eyeing the kit for the VW Bus sitting on the next shelf up…
Here’s a short video that shows a bit of the lights in action:



That looks fantastic! They really should use your shots for their sales site, since the ones on their site don’t make it look nearly as impressive.