Is this too much light

[Rodehazrd]

It’s my second try with an LED I got this 300w Bridgelux by Mars. First time I had dark veins with pale leaves and brown edges. This time I’m further away 24” and now running 75% power.
I’ve got tips looking bad on the taller one and I wonder if I’m starting to burn or is it a symptom of being too wet.

 

[Creeperpark]

Looks like light burn to me. What kind of water are you using? One way to limit light burn under LEDs is too add cal mag to the water if you are using a low ppm water.

 

[acespicoli]

Theres a app you can get for your phone to measure ppfd and you can set the light to specs in my let there be light thread based on your stage of growth

 

[Porky82]

The plants look fine to me. Maybe a tad bit to much N as tips are just a tiny bit burnt. Otherwise I don't see any damage from the light.

 

[acespicoli]

The media your growing in is a mystery
What exactly is that a organic / hydro SIP?
Your plants look nice not too shabby!

 

[Rodehazrd]

Thanks folks for the advice I did lower the light power some, it’s only those top tips burning. I’m in a mix of peat perlite and worm castings. I haven’t fed these auto’s yet so shouldn’t be nute burn yet. They were started first week of April and I plan to give them some fish hydrolysate soon the critical seems pale but the haze is dark green. Mixed strains in one pot not ideal.
It’s been a little too wet all along but in 30 gallon tub it’s hard to fix that. Some leaves have rolled edges and I think that’s causing it.
I make these sips i put two 4” sanitary tees in the bottom tub , I cut a net pot in my the center of the top tub 6” net pot for the 4” sewer pipe.
On this one I had some 6” tee’s so I cut in an 8” net pot to reach bottom. Didn’t think it mattered but 6” of water instead of 4 in the bottom tub may be an issue. I keep an air stone in the bottom too.
The strains are lemon haze auto’s by Barney’s on the sides and a critical 2.0 auto freebie from seedsman. The 3 gal pots in front are Runtz and the two on the left are Durban Poison getting ready for outdoor sometime in June.