leaf tip yellowing

too hot medium, but nothing special, if its soil, i would wait with puting more nitrogen for 1 or 2 waterings, if coco - feed 20% less.

100% light

I experienced burn issues with the LED lighting, especially around week 4 in autoflowers. However, it's important to note that nutrient-related factors, as mentioned by others, could also contribute to this problem. Keep a close eye on the leaves turning brown for confirmation. If you want to definitively identify whether it's a light-related issue, consider using an app like Photone or PPDFMeter. These apps are ccurate enough to provide a reliable gauge of your light-related concerns.

Too much nutrients, nothing to do with light/lighting. It will be ok, but go very, very light on the feeding, but you probably won't have to feed for a while yet.

Just a slight burn back off ur solutions a little bit

Your plant looks super healthy. How far away is your light and what type of light are you using? It could be due to a strong presence of nutrients in the soil. Not enough to burn them, but enough for the plant to let you know. The other thing i would think is mild light stress.

The burnt tips are due to feeding too strong of a nutrient solution. It's called nute burn. You have early stages and will get worse if not addressed. The roots are getting burned. I would cut back on your nutrient 25%-50% and gradually build up again. You should really flush first. Have you got an EC/TDS meter? Measure your run off and see if there is a big difference. Anymore than +0.6ec/300ppm isn't recommend.