Answer:
Mine burns at an average of 180 degrees C. The white coals are the hottest at temperatures of 250 C, but only cover an average of 20%. The red coals, burn at 200 C and make up 40% of the barbecue, leaving the remaining 40% (of lit coals only) to burn at 125 C. The more white coals you have the more higher the average temperature, but the less effective the cooking.