EZ RGB's Bullet Pixels are a lower-wattage (.3w pixel vs the normal .6), use 18awg wire, and are 12v.
It's the tried-and-true standard of the Christmas light hobby, and it's in stock! They also have a few different spacing options, which is great if you have props that require a wider spacing than the typical 4".
From the Manufacturer:
Specs:
- Resistor WS2811 12mm smart RGB Pixels Bullet nodes
- DC12V
- 0.3W/pc
- 18awg black wire
- 10cm wire spacing from base of pixel to next base of pixel
- 15cm flat wire 3 core 13.5mm waterproof xConnect pigtail
- 1 year warranty
- Sold by EZRGB thru Above AVL