i followed simota's foglamp install and for power, i used the passenger side cigarette ligher socket. i dont use the socket anymore (removed completely) and feed my interior bits from that.

ive only used the rear fog once in a real dense fog condition, but i felt very glad i did this mod because cars in front of me were hard to see with just the tail lamps on in idle-on condition. :)

Thanks for the info! +1 rep from me :)