lambda (nm) mean (%) stdev (%) 350 48.9 6.2 400 78.3 4.7 450 85.7 3.9 500 84.7 3.3 550 82.8 2.8 600 80.8 2.3 650 77.8 1.8 700 71.8 1.5 750 61.9 1.4 800 49.4 1.3 850 37.6 1.2 900 24.8 0.9 950 12.0 0.5 1000 4.3 0.2