WHILE WORKING ON MY TRUCK, I LEFT 1 BOX SITTING BESIDE THE PASSENGER REAR TIRE. I SMELLED SOMETHING BURNING AND JUST THOUGHT SOMEONE HAD A FIREPLACE BURNING. MY SON CAME OUT AND ASKED ME WHY THE BOX WAS SMOKING. THE SUN REFLECTING FROM THE CHOME WHEEL CAUSED THE BOX TO CATCH ON FIRE. THIS OCCURRED ON 8 APRIL 2018 IN PASADENA, MD AT APPROX. 5 P.M. WILE THIS IS NOT A VEHICLE SPECIFIC ISSUE, IT SHOULD BE ADVISED TO OTHERS TO BE AWARE OF THE FIRE POTENTIAL CAUSED BY THE SUN REFLECTING FROM THE CHROME ON A VEHICLE.