Custom aftermarket lighting kits like that aren't that weird, but tend to be only available for the more famous/popular subjects. Like, finding a kit for a given Star Wars or Star Trek ship kit isn't unusual, but it is unusual for an obscure or non-franchise design like this. And it's extremely rare (almost unheard of) to have one packaged as part of the base kit.
Some old kits would come with lighting kits, but we're talking old as in "grain-of-wheat incandescent bulbs", and very, very rudimentary lighting setups.
Only total package like what their describing that I can remember off the top of my head is the Bandai 1/1000 Star Trek ship kits, which I think were made around 2010 or so IIRC. Full custom LED circuits with internal light transmitting and diffusing clear parts, basically to replicate what would have been done with lots of internal fiber optics, external studio lighting trickery, and VFX on a 6-foot movie miniature with internal LEDS on an 8-inch model kit.
This kit was clearly someone's passion project, and that's pretty cool in its own right.