8 Minutes, 19 Seconds

7 x 7 light blue (2005). 60 x 60 inches
Magic Square of the Sun (2009). Each panel burned for the corresponding number of minutes in the magic square.. 50 1/2 x 50 1/2 inches (128.3 x 128.3 cm)
Fibonacci: 54 yellow (2003). 198 x 74 1/2 inches
Orange Triangle (2008). 60 x 60 inches

The opposite of the solar spectrum. Here sunlight is focused into a single point of raw power that burns a path across a wooden plank. Portraits of sunlight drawn by the sun itself. Clear days create a broad smoke flare, passing clouds leave unburned interruptions, overcast days produce blank boards.