I printed the front of the light box flat on its face on a cool plate. Took only 3 hours and turned out wonderfully! The back plate took 1 h 30 mins. Great print! Used SUNLU PLA+ in Blue Gray and Yellow. 126.94g for first plate. 61.81g for the second. I used a battery powered COB LED light strip adhered to the inside edge. Turned out great!