Did a good pruning and defoliation of it. Also gave it local soil conditioner famous for having bio char. That and worm casting tea have it a good boost
Pal. At 450w. You shoulda be running at 25% for the 1st week. You shouldn't have to exceed 50% for your whole veg with such a high powered light. So I'd say she's at a right setting now.
No need to use more watts that's not needed.
Good luck