Can this light be set up so it come on and stays on when it ti dark ie not actiated by motion just come on when it is dark

This particular light you are looking at is coming with a motion sensor and it cannot be disabled. 

If you require the floodlight without the motion sensor, this is the same item that operates as a regular floodlight, automatically operated dusk to dawn. This is also the brightest option out of the lights below:

https://sunnybunny.com.au/solar-lights/solar-flood-lights/powerful-30w-solar-flood-light-commercial-grade-outdoor-cob-led-light.html#/74-emitting_colour-white  

Alternatively, you can also have a look at these floodlights that do not have motion sensor function:

https://sunnybunny.com.au/solar-lights/solar-flood-lights/commercial-grade-solar-flood-light-high-power-led-60w-100w-120w.html#/74-emitting_colour-white/148-model-60w 

https://sunnybunny.com.au/solar-lights/solar-flood-lights/universal-powerful-solar-flood-light-double-led-head-remote-control.html#/74-emitting_colour-white/148-model-60w