I thought the lights were burning the the Diesel seedling but in the end I figured out it was the soil or pH ( I don't have a pH measurement yet) as the white haze seedling was okay under the same light.
I am still just giving them water and no nutrients. Maybe in two more weeks I will start.
Peace! ☮️
hay its a lovely set up you have
the ts600 is a great light but not very powerful so id
say you want to hang the light a little lower
closer to 30cm above them in veg and more like 15 in flower
good luck