Weird Spots on almost every leaf overnight? (Leaf Burn???) My plant developed these spots on the leaves basically overnight...

The pattern on the leaves (those widespread yellow/golden speckles and blotches that appeared very suddenly) strongly suggests light burn caused by water droplets rather than a nutrient deficiency or pest issue. Here’s why: You mentioned the plant got soaked in the rain, and then the grow light came back on while the leaves were still wet. Water droplets act like tiny magnifying glasses, focusing and intensifying the light onto the leaf surface. Under strong grow lights (especially LEDs or HPS), this can cause rapid localized burn spots almost overnight. The fact that your other plant (which stayed dry) is perfectly fine supports this. Pest damage (like thrips or mites) usually looks different — more like silvery streaks, stippling, or tiny bite marks that spread over days, not uniform golden speckling across wet-exposed areas overnight. What you can do now: Don’t panic — the damage is mostly cosmetic. The affected leaves won’t recover, but the plant can continue healthy growth if the issue doesn’t repeat. Remove the worst leaves if they’re badly damaged — this reduces stress and lowers the risk of secondary problems (like mold on dying tissue). Going forward: Always dry leaves before lights come back on. A gentle shake or a fan works fine. If moving plants through rain, try to keep them covered. Double-check your light height/intensity if leaves are already close to the light. 👉 If you notice the spotting continuing to spread on new, dry growth even after fixing this, then it could be something else (like a deficiency or early pest issue). But right now, this looks like rain + light burn. I hope that helped! 😘