I arrived home from work at approximately 7:45pm, which is about an hour later than usual. i immediately lit the grill to get the charcoal ready by the time i had the meat prepped. while standing in front of my grill, i noticed two extremely bright lights to the northwest where there are aren't usually lights. a tree partially covered them so i had to side step a couple of feet to get a clear line of sight. at first it appeared to be only two lights until i stepped to the left. there were three in a triangular pattern. the light at the top of the pyramid was intensely bright. it was what caught my attention in the first place. the two lower corners were not as bright. it stayed stationary for the entirety of the viewing with the exception of rotation of the triangle. the top light which was the most intense was pulsing between slightly brighter than the others and incredibly bright. i ran inside and made my girlfriend come outside. we both observed the lights and for approximately another minute or two before the top light became so intensely bright that it revealed the shape of the object and then it completely disappeared. i work within 500 yards of a large airport lovell field in chattanooga tn. i know what landing lights look like, and this was not an airplane. the minimal angle of its movement was upward to the horizon when it completely vanished. i find it hard to believe this was not seen by several people. this is the second event i have reported to mufon in a 10 yr period, but i wanted it documented in case someone else comes forward.