Flash pic as diagnostic tool

I was snapping a few pics tonight right before lights out...decided to take a pic with flash after the light clicked off. Im not too worried about the lightest color plant at the moment, but, wanted share something that stood out to me from the after dark flash pic. Issues stand out and I can scroll around and zoom in...this would have been helpful as an early warning ar least on fading yellowing. During the day the plants are faded out even with glasses. This is probably a no brainer for most, but its now in my grow toolkit going forward. Pic was taken on my ipad.
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I look at the plants whenever I open the tent. Even so, I go over the images and often first see problems there. I found this method very useful, especially while I was growing under 'blurple' lights.
 
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