stltoed
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I'm not sure what to tell you. But since the vast amount of poisons aren't clear you should be ok right?. I've seen bleaching and damage from lights, but never from water droplets on leaves.You every see light bleaching? Light burn... not necessarily heat if that's what you mean.
Now you see the shape of a droplet right? It can focus the light.... just like burning ants with a magnifying glass. It concentrates photons in an area and CAN damage the leaf.
Just because you haven't had it happen doesn't mean it can't.
And I have thought about it.
How can you compare lawns? Think about it.
Your comparing a plant that's blades are vertical reducing light capture. On top of that sunlight has peak intensity maybe 3-4 hrs a day about 130k lux on a clear sunny day and declines fast
We can be running 45k lux for 18 hrs.
It's not even remotely comparable
It's just best practice.
That does not mean you will get burn but the purpose is also for the leaves to absorb the sprays not evaporate the water and leave residue.