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. 2014 Dec 3;9(12):e113595. doi: 10.1371/journal.pone.0113595

Figure 1. The spectral distribution of the Blue, Blue-Enriched, Blue-Medium, Blue-Depleted and Green LED arrays.

Figure 1

The power, current and voltage of each LED array were the same: 2.2 W, 40 mA and 220 V, respectively. Each LED array was controlled by a pulse width modulation (PWM) driver to maintain light intensity at the exact same level.