Can this light be set to automatically detect and light up only at night without having to manually turn the light off and on every day?

The motion activated solar floodlight has a photocell inside PIR sensor. It will not be activated during the day. If the light is turning ON during the day, check settings (under PIR sensor). Ensure unit is set to “On(I)” and not set to “Test🔍” mode. If unit is set to “On(I)” , but still activating in the day, please contact KODA support for a replacement unit, or return to the retailer of purchase.