FeebleSnane

You don';t sound new to growing.You've certainly done your homework.I don't think those spots are anything to worry about.You need to keep temps up with LEDs.You could do with getting those temps up.Is you light turned down as I think you could turn it up a little which will also improve the temps.Over 26c not sure about f.I just checked and 72f is 22c and that's too low.You want it over 26c.I see your light is kickking out 400.Sanlight test grows do their veg at 500.I'm new to checking my light out put with my phone app.I managed for almost 30yrs without it.I'd double,triple check all information given on here mine included.Iv seen some right woppers on here.

The Train Wreck plant was growing into the light this week, so I had to raise it up a lot and turned the power up to 60%. That gave me just over 400 PAR at the top of the plant, and it was getting around 450 before I raised the light. I think I noticed some discoloration at the tips of the leaves towards the top of the plant, so I felt okay with 400 at the new position. The temperatures have also gone up to ~76f/24.5c. I'll keep an eye on the plants to see how they like the higher temps. P.S. I gave them a heavier dose of CalMag today, so we'll see if that stops the spots.