Deformed new growth - Please help

[Konnah]

I have deformed/half looking new growth leafs I don't know if it's a big problem or how to deal with it any advice will be appreciated they are under a 300w led 4weeks in veg soil grow.its winter atm s0 I put my ducted air conditioning on 17degrees at night and I don't know if that is burning it

 

[Dave Groomer]

I have deformed/half looking new growth leafs I don't know if it's a big problem or how to deal with it any advice will be appreciated they are under a 300w led 4weeks in veg soil grow.its winter atm s0 I put my ducted air conditioning on 17degrees at night and I don't know if that is burning it

Some pics would be helpful. Here is a link on how to post pics. Photo Gallery Guide - How to Resize, Upload & Post Photos

 

[Planter420]

Sounds like it could be a number of things. Pics needed