Bright Lights formed and disappeared in a triangular shape

Off in the distance, it looked to be over the Apache junction area. Three very bright lights appeared and seemed to very consistent with altitude and positioning, formed in the shape of a triangle. The three very close bright lights stood out in comparison to surrounding stars and planes. The lights were not flickering and bright white. Behind the lights was vague silhouette in a triangular shape. The lights faded out along with the silhouette very quickly and disappeared.