Max Lights (Data): 680 (approx 220 ft)
Max Lights (Power)
RGBW: 555 (approx 180 ft)
RGB: 870 (approx 280 ft)(This distance in a straight line would require pretty thick power injection cables; however, it is achievable if the lights are densely located or run in a circle, allowing injection in both directions. It is still not recommended, due to limitations using the WS2811 protocol and the max number of pixels on a single port to achieve 40 FPS.)
Although the RGBW lights draw less power when only using the White LED's, they have the potential to draw more power when both white's are used. This would be all RGB on to produce white as well as the W to produce white. Because of this, we design to handle the worst case scenario and reduce the total number of pixels this power supply can handle to account for that.