They have to be hardwired into a circuit and turning it on/off only by a wall switch.
Type of Bulb
Die-cast aluminum +PC
-20℃ ～ +40℃
16.65x 10.24 x 1.73 inches
2 X 190W Flood Light
1 X User Manual
How does it turn on? Does it need a switch?
Does the light have dusk to dawn function?
Can you replace the bulbs?
No, like any other led fixture you'll have to replace the fixture when it stops working.
Are these dimmable?
Are they 15000 lm each?
190 watts each or both in total?
190 watts each