Light burn?

Good morning

I am in day 30 of flower
DWC seedsman fem Jack Herer
Half dose of General hydroponics flora Trio

I believe I’m getting light burn the canopy is at a minimum of 20 inches and my lights are dimmed below 50% the symptoms are occurring up to 30 inches down. The symptoms are Extremely slow and only on new growth.

lights- 3 vero 29 c no lens or reflectors roughly 240 watts built the fixture in 2017 and never used.

I am blown away by how powerful these things are or this stain is quite sensitive not sure.
What is my best option moving forward I’m out of height in the tent I know I can dim the lights more or I could bent the canopy?

Input much appreciated

Zoufs

Pictures of the plants would be helpful

My bad they didn’t stick.

I’m just seeing some burnt tips. Nutes probably got a little hot at some point. Doesn’t look or sound like light burn to me. If it progresses I would lower the ppm like 10%