Now I’m confused a 4’ should put out double the umol compared to a 2’?
What’s the umol of a 4’@.7a?

That's crappy. I'll grow this one out and toss no need for TMV to be around.

Wow thanks a lot. You think the seed was infected with the virus.

Oh and thanks for the help uncle
How did you calculate ppfd? I take the 2.5umol/wat doesn't work across the bord? Does that factor work up to .7a/strip?

This is what's worrying me. Looks like deficiency? Cal? Or mag? I have not been adding calmag up to this point but just did a res change and added 15 mill calmag to 46L "pretty light" then another 6 mill a couple of days after to the res. Running pretty light feed. Plants don't seem to want more. 38...

Ya gen 2
Light raised for pick. Usually run at 10" giv or take. It's the 4 hydro in the back. The light coloured ones are in dirt, witch I'm not very good at either LOL

4x4

Eb 3500 16 4’ strips
1.2a 220 to the driver so 264w-losses. About 8” I may have some cal mag issues.

If it's repeatable then at least you have a tool. My meter is a cheep Chinese but it's quite reputable so I can at least document.

Any of you with strips using a lux meter to monitor what intensity is working? If so what are your numbers? Seedling veg flower.

I’m running 40000 flower looks to be the limit for now. Starting to show signs of too much light or maybe a deficiency. On about 3rd week.