Any idea what this is , i think its overwatering but soil is dry, its auto flower and ive been giving it 24 hrs of light

I’d try less water and less light. How far is your light from the plants? What intensity?

Others know much more than me and will add their advice.

More details would be helpful. What kind of light? What kind of soil/medium? Any nutrients? What are temps like?

To hot mix is my guess. But we need more info like starting medium and your inputs to be able to help.

Looks like you fed before it was needed

So i used potting soil with perlite i was using a 250 led as i was giving it more light aswell as sunlight but i feel like humidity could have been a issue as it dropped to 40%

Could it also be underwatered because of humidity?

Alexz21 said:

So i used potting soil with perlite i was using a 250 led as i was giving it more light aswell as sunlight but i feel like humidity could have been a issue as it dropped to 40%

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Don't treat it like a kid stuck in the system. Give that baby a solid home. Raise your light up to at east 2.5ft away. let the plant grow into it.
Water less frequently. It should be dry & light weighted when water is needed. If there's any weight from moisture.. let it rock out.
Loving them too much at an early stage is the most common mistake I see.
The plant will learn to like your environment for the most part, what I noticed they really don't like is sudden change, or crazy swings in temps & humidity.