Turn off the blupurple light and take a new pic with flash under white light. Then we can offer better advice. BNW
What are you growing in, what are you feeding and how often? Brass is right that, better pics with a white light are needed.
The plant is a 3 week old autoflower, I’m using ffof soil, no nutrients added yet,only been watered 3x (total of 3cups RO water) PH 6.4, 12” from 300w LED light (3x3 tent) new growth is good no spots it’s only on the bigger older leaves the plant overall is healthy, ph runoff is 6.4. Foliar sprayed once when seeding and then put under the light, which i know I shouldn’t have done and haven’t since