anyonedercommentedweek 45 years ago
@LuckyLuke, Okay cool. Since you can't quite know how they will react just check every ~2 hours if you can. The signs that they get to hot are widely discussed on youtube. I had my light too low once and immediately saw it by having the highest leaves developing brown dried out leaf tips, so watch out for that. (Of course if one where to overfeed nutrients that would also lead to brown leaf tips.) 33ยฐC is really quite hot. Where is that measured? Whats your room temperature? (Not grow-box temp.) Maybe if you had like 26ยฐC of room temperature you could bring in colder air at the bottom and exhaust the hot air of your grow light from the top. As heat always moves upwards that might help keep your roots cool. (They are the most vulnerable to heat stress. Your leaf tips can transpire water if they need to and cool themselves down but if your root's get to hot they can't function properly and then the whole transpiring collapses and your plant just dries up.)
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