FastLED vs Adafruit_NeoPixel for RGBW LEDs

Multicolor LED strips generally come in two flavors – solid color and addressable.  Solid color strips, as the name implies, have all of their LEDs display the same color.  Addressable strips on the other hand allow you to control the color value of every individual LED in the strip.  The most popular individually-addressable LEDs on the market at the moment are Adafruit Industries’ NeoPixels, based on the WS2182 chipset.  They come in a variety of physical packages including strips, rings, and matrices.