Every light strand will need a controller.

Light Counts (2020 or Older):

• 1-port (wifi) can hold up to 250L or 400 lights with a Y Splitter (RGB/RGBW)
• 2-ports (wifi) can hold up to 400 RGB lights or 500 RGBW lights
• 6-ports (ethernet) can hold up to 1250 RGBW or 1500 RGB lights (controller must have a minimum of 750L connected at one time to work.) RGBW is still limited to 5 ports no matter the light count used.

Light Counts (2021 or Newer):

• 1-port (wifi) can hold up to 250L or 500 RGB/RGBW lights (With a Y-Splitter)
• 2-ports (wifi) can hold up to 500 RGB/RGBW lights
• 4-ports (wifi) can hold up to 1000 RGB/RGBW lights (Not compatible with 2020 or Older Lights)
• 6-ports (ethernet) can hold up to 1500 RGB/RGBW lights (controller must have a minimum of 750L connected at one time to work.)

Light Lengths:

• (2020 or Older) 200L single line count Twinkly Pro – 66.6’ long with a 16’ lead between the controller and first bulb
• (2020 or Older) 200L dual-line count Twinkly Pro – 33.3’ for each strand with a 16’ lead between the controller and first bulb
• (2020/2021) 250L single line count Twinkly Pro – 83.3’ long with a 16’ lead between the controller and first bulb
• (2020/2021) 250L dual-line count Twinkly Pro – 41.6’ for each strand with a 16’ lead between the controller and first bulb

Side notes 

• RGB and RBGW cannot be grouped together.
• Wifi controllers can only be grouped in groups of 10.
• Wifi controllers and Ethernet controllers cannot be grouped together.
• Twinkly Plus/Pro are IP65 weather rated with a UV protected wire
• Plus and Pro are only compatible with an IOS device (Apple iPad, iPhone.. etc)
• IOS (Apple) devices must have IOS 14 or higher to be compatible with the app