Im going to say the light is to close and not enough air circulation at the top of your plants. if your misting your plants stop untell you correct the heat problem, misting will burn the leaves faster. i always have a temp gage it the tops of my plants. you could also suspend a temp gage from a string from your light for a couple of hours and see if your cooking them.

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Ill be in the st.lewis/ mt. vernon Illinois area tattooing some time next week. let me know if you need a appointment.
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