If you check the manual, you'll see that non-premium Cyos are specified to run from 7.2V DC, with an absolute maximum rating of 7.5V (and a specific polarity).
In testing, I found that the apparent brightness drops off rapidly with voltage, so you really want to stay as close to that 7.5V as possible, as long as you don't exceed it. I powered the one on barakta's trike using a regulator designed for Power-over-Ethernet applications, which can accept the 52V from the nominally 48V traction battery and outputs a rock-solid 7.5V for the lighting.
Meanwhile, the Cyo Premium manual fails to specify a DC voltage, and suggests that you invest in the e-Bike version, which accepts a wide range of voltages (presumably without brightness issues). It then goes on to warn you about polarity, suggesting that DC operation is still possible.
In my previous post, I measured the steady-state current of barakta's trike lighting system (ie. one original 60lux Cyo and two Spanninga Pixeos, running at 7.5V) at 300mA, which should suffice to calculate run time.