1. Does a Digital LED strip and an Addressable LED strip mean the same thing? Adafruit calls them Digital, but stores on Alibaba/ DH Gate etc call them Addressable. Also I don't care about PWM, I just need to turn them on and off.
I'm sure that is the same thing - they "chain" from one to the next using a digital protocol.
2. Does anyone know of a good product that is an array of addressable LED pixels or strip that are just ultra bright white and not RGB? Or even ultra bright RGB might be cool, I've heard that RGB LEDs produce a more even spectrum of light than whites, but that could be BS.
Haven't come across any, but that does not mean they do not exist. Since the "addressable" ones use a particular chip, and that chip is designed especially for RGB use, plain white ones are less likely.
It would be BS. RGB LEDs produce three very pure and distinct colours which the eye merges. In terms of the spectra, the combination of phosphors used in the White LEDs would each have a much wider spectrum and - if it ever mattered which for vision it should not - combine to a more uniform overall spectrum.
When I google this I'm never sure if the product is actually addressable.
You do have to be careful.
3. Does anyone have any link/advice about driving 64+ ultra bright LEDs from a battery? I want to keep this thing portable but obviously I still need to cart around some batteries.
Yes - big
battery! Presumably Li-Po rechargeable but you do
have to be very careful charging them. The problem is matching the voltage; one cell is 3.7 V nominal, two makes 7.4, you want 5V even. A low drop-out switchmode regulator could probably do a good job of turning 7.4 into 5.
Also if anyone randomly knows where I can get my hand's on a light weight geo-dome kit about 1-2m diameter that would be awesome.
It's called - as you should know by now - a "perimeter". My mate Karl, now pretty famous as Julius Sumner Miller's (intellectual) inheritor on the media, was working on one when we were back at Uni - but that was a long time ago.