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. 2019 Oct 10;14(10):e0215114. doi: 10.1371/journal.pone.0215114

Fig 4. Effects of the angle position of the LEDs on the illumination uniformity using direct illumination.

Fig 4

Each row corresponds to a different LED; the angle and the digital color channel analyzed are indicated on the top right corner. R: Red, G: Green, B: Blue. Fluorescence intensity has been normalized to a maximum value of 1.