Leaf Curl

So I’ve grown peppers for many years but it’s been awhile since the last time I’ve grown indoors.

Here are my conditions

Lights are putting off about 8-10 DLI and 9,000-11,000 Lux Approx @12 hours a day

Temps spread from 70-80 night to day

I know that I for sure have not been over watering.

I have recently given them some fertilizer at half strength.

Thoughts?