Hi Lawrence, thank you for your post.  If you are using Pico LEDs, you actually want the BRANCH10 adapter, since that one and also the Pico LEDs have small connecting plugs.  (We're currently out of these but I'm actually making more today, so they'll be back soon!) We posted a guide a while back showing the options for connecting Pico LEDs:

https://forum.brickstuff.com/t/x166pn/options-for-connecting-pico-leds

Hopefully this helps explain.

The AA battery pack will power up to 100 lights with no issues, though if your houses will be close to a power outlet, you might want to go with the USB cable instead, so you can power it from wall power with a spare iPhone/iPad type plug-in adapter.

I'm not sure how many houses you will have, how many lights will be inside each house, or how much space will be between each house, but depending on the answers to those questions, you might want to go with multiple adapters, one inside each house, and a connecting cable (like the GROW24 cables) to run between houses, all powered at either end by one power supply (the AA battery pack or USB cable).

If you have a drawing of your setup that you could share, I'd be happy to make more specific recommendations if needed.

Thank you again!

Lawrence Adamiec Thanks for posting this.  Depending on how many lights you have in each building, you could use either of these adapter boards, one per building:

• For 4 lights or less per building, use this 4-plug adapter.
• For up to 10 lights per building, use this 10-plug adapter.

Then to connect buildings and adapters, use these thick 24" connecting cables. Connect each building in series, end-to-end.

Put your Brickstuff USB cable on one end of the string, and connect to your power source (either your own iPhone/iPad type charger, one of our adapters, or a USB battery bank).  One power source can power 100 or more lights.

I hope this helps!  Let me know if you have any additional questions.