Where is the light burn?

High Momentum, The problem here is a starting nutrient lockout from wrong pH value. You got a really small pot and you do not measure and adjust the pH. If you want to grow this plant successful you need to measure pH, keep the pH within the right value and always water with at least 20% runoff to prevent nutrient salts building up because the pot is so small. If you do not water till runoff the pH and EC will also rise really fast. So buy a pH minus liquid and a cheap pH measuring tool and grow this girl till she got them fat and juicy buds! 💚

I don't see any light burn. Keep it up. Looks good .

Young leaves looks very strange ( ph or wrong food like ) , older has long stems, would say you miss light and good feeding, watering or ph. So my thought is totally oposite to light burn.

It's tough to tell sometimes. If it is severe, it's easy, but if it creeps in the initial symptoms are not too unlike some nutrient-related symptoms. You can use other visible factors sto help confirm -- e.g. if the light is too intense, the node spacing will diminish. Extremely tight nodes cause some weird looking plants with several sets of leaves orginating from a small stretch of stem. interveinal damage is one of the earlier signs too - on the top-most leaves but anywhere on the plant receiveing too much light is possible. You take an indoor plant outside, you'll likely see it all over the plant and not just the top. If the structure is solid and the plant looks healthy, your light is probably fine. Providing slightly too much might takes weeks to see a hint of a symptom. the severity and rate of progression dictates the amplitude of your reaction. Leaves don't always wilt from too much light. I have 2 plants that got a little light burn and they can "pray" to reduce surface area, too. Sadly very few symptoms are discrete. No matter what is going wrong you need to cross-reference as much information as you can to diagnose most things.