Ducky's Zero series is their affordable line. From what I recall for their Zero S(hine) line is that they're available in only 2 LED color choices, Blue and Orange. In terms of lighting modes, it's LED on/off, 8 levels of brightness and the breathing mode. In comparison to the Shine IIIs, the Zero S does not have programmable lighting functions where the LEDs stay on for specific keys, ripple mode, wave mode, etc. etc. As with the normal Zero keyboards, they come with an attached USB cable.
Bottom line, if you want a fairly basic backlit keyboard without all those unncessary lighting modes, attached cable, and the solid Ducky quality, the Zero S series are a great option.