I use a lot of rope light and my meters show it closer to 3 or 4 watts per foot, and I run it through a dimmer when I want to lower my power draw.
AEZ does have a lot of cool ideas and technology... but honestly, AEZ is a pretty dark place.
Major lighting effects pretty much require real power, amounts that solar and batteries just don't make unless you spend sums of $$ that make generators look cheap by comparison.
There are very quiet generators available... some people think ANY sound at all from a generator is the end of the world and apparently go to Burning Man because they want silence... ???... but if it's just not in the budget, big lighting effects probably just aren't in the budget.
In your shoes I think I'd go with the lanterns idea.
I used to hang with Costco Soulmate Trading about ten years ago, I dunno what's up lately but at that time they were right at Center Camp, they had BM power, and they were proud of the fact that not a single electric light showed at their camp at night!
"Whaoomph! Whaomph! Burbbleburbblepattpattpattpatt... WHAAAAAaaoooaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa........!!!"
Top fuel dragster, by Elliot Naess