I want to chain up a very long LED strip to a single source of data. I will be using an ESP8266 and about 15 meters of WS2812b LEDs. With about 30 LEDs per meter, I need to power about 450 of these total. I've read multiple places they're about 60 mAh each, so
60 * 450 = 27A required to run all of these, assuming I want full brightness at red or white (not sure which draws most).
I've experienced that I can (but should not) power about 6 meters (180 LEDs) with a single 2.1A supply, which actually ended up drawing 2.3A (Samsung phone charger). I wrapped the 6 meters around a tube, so I could easily solder some wires from the top to the bottom, so the voltage drop was lower. Every color looked great, but white had a yellow look to them. I know that wasn't suitable at all, but I was simply trying it out.
I'm now trying a different approach, which should work much better. If I for every 3 or 4 meters wire up a wall charger to the strip, can I achieve what I want? This is what I had in mind:
Here's another thing I had in mind, which would help a lot, since I don't have wall outlets every x meters in my house. Can I do something like this instead, if I make sure to use good gauge wires, so they don't lose voltage?:
As a third option, I have a couple of 12v 2A supplies (like the ones above). Can I buy some cheap, alternative hardware, such as voltage regulators, and wire it up in an alternative way?
The question here is not powering the strips. The question is really if chaining the supplies as my first image is possible and what might could go wrong, if I do it that way.