For my first year, I used 3 inch frosted glass globes for the top of my light sticks. They are very hard to find, so this year I will replace them with a pixel circle. These are 2 inches in diameter to keep the cost down and either have 10 or 12 pixels. They also have the same spacing a pixel strip, so they can be directly attached.
The BOM consists of two parts.
5/6- 0.1uF 805 capacitors
10/12 – WS2812B pixels
The board is available at OSH park (ronp5683), or you can e-mail for my stock.