Please see tbelow from the instructions the Three modes. So to not have it on all the time, you might just want to use mode two.
How to use:
Mode 1: Light is set to remain at low brightness until motion is detected which activates high brightness for up to 28 seconds.
Mode 2: Light will only activate when motion is detected for up to 28 seconds [This is the best mode for winter]
Mode 3: Light is set to remain OFF.