Problem: Uno may not be able to deal with that many LEDs. It depends how you wire them. If you wire them all to the same Arduino pin, then it should be ok, but all 6 strips will show identical patterns, because the Arduino thinks there is only one strip of 300 leds. If you wire them in a chain, or wire them to separate Arduino pins, then you would be able to have different patterns on each strip, but the Uno will not have enough RAM memory. For 1,800 LEDs to be controlled independently, 5,400 bytes of ram memory will be needed. Uno only has 2,000 bytes.I've never used one myself, but I would suggest upgrading to something like a Trinket M0.
I just want to control which light is what color.
You still have not answered the question of how these 6 LED strips are to be connected.Are you going to solder all 6 strips into one long strip or not?
Then Uno does not have enough RAM memory. It makes no difference if the pattern is complex or simple. Only if all 6 strips show identical patterns & colours will the Uno have enough RAM.
One strip of 1800 LEDs should be doable.
With Uno? If you know a way, please explain, both the OP and I will be interested to know how to do this.
What do I know?
Well, I know you read post #1, because you commented in post #3 that the OP had not answered my question. So I was wondering if you know of a way to avoid the problem I described in post #1, like some code or library which does not require 3 bytes of ram per led, but instead allows generating those 3 bytes "on the fly" just before they are sent to the strip. I know that's possible, I remember reading that someone had achieved that in the past, but I can't find that thread.
I can not use 1 Arduino for my six light strips that will be daisy chained... equaling up to 1800 led's?
It seems that the color patterns you want to use are extremely simple. So simple that a value could be computed for each LED with very limited memory usage.But more explicit detail would be helpful.I would also say that you could hook up one strip and just use, say, the first 10 LEDs to learn what you are doing.