Outdoor lamp post wiring

I removed the light from the outdoor lamp post to paint it and thought I'd remember which wires connected to which but now I'm stumped. In the light part I have a black wire, a white wire and a copper ground wire. However, in the post (which is non-switched with an automatic light sensor) I have 2 white wires, 2 black wires, 1 red wire and 1 copper ground wire. I believe the red wire in the post was connected to the black in the light. I also think the 2 white wires in the lamp post were only connected to each other? Of course, the ground wires go together, but will I be safe connecting the white in the light to the 2 whites in the lamp and leaving the 2 blacks just connected to each other? Additional information: When I removed the light and capped the ends of the wires, the two lights (switch controlled) on my garage stopped working. Did I interrupt the circuit? Thank you for any help!