19-19. These flares reach a height of 200 to 215 meters (660 to 710 feet) and descend at a rate of 2.1 meters (7 feet) per second. The M126 (red) burns about 50 seconds and the M127 (white) about 25 seconds. At night you can see these flares at 48 to 56 kilometers (30 to 34 miles).