It really does look like they handed the interns a couple hundred bucks, sent them down to the local lawn & garden center, and gave them 5 hours to pull everything together. It looks cheap and hastily thrown together. None of it relates to the mission of the attraction; it's literally just some strings of lights thrown haphazardly around the greenhouses. Perhaps if they updated the audio to include holiday music and/or new narration if would make sense, but as it is, there's just no rhyme or reason to it.
It's even more confusing when you consider that, more than any other indoor attraction, the extra lights are useless during daylight hours. And given the average guest's park touring habits and that the attraction typically closes at 7pm, very few guests will actually see this in its full glory (such as it is).
I will give them credit for trying. But for the worldwide theme park industry leader, I think they could try harder.