Fig. 2.

Representative results of an LPA calibration. Each well has two blue LEDs. (A) Heatmap of the irradiance measurements for each LED prior to round one of calibration showing the uneven distributions of LED irradiances in an uncalibrated LPA. The CV of the LED irradiances is 12.5% before calibration. (B) Heatmap of the irradiance measurements for each LED on the same LPA after three rounds of calibration. The CV of the LED irradiances is 0.82% after calibration (C). Histogram depicting the data represented in the heatmaps of this figure. The values across the calibrated LPA have converged to the dimmest LED.