@Rogue maximum temperature 28 celsius… minimum 23 degrees celsius… room humidity is a little high 70 percent humidity… lights i left with 12/12h… air inlet and air outlet plus ventilation
@Rogue I use two samsung panels, one 65 watts and the other 120watts chip led… they are 30cm apart
On second consideration, it does actually look like the lower growth hasn’t suffered, which is what you’d expect with deficiencies of mobile nutrients, so nitrogen isn’t it; it could be iron as @George said, which is immobile, or it could be the light burning them, or both. @Rogue is right that it’s simplest to try the lights first, and it’s much easier to change back than it is to remove nutrients from the soil after you’ve added them. Too many nutrients can be as bad as not enough.
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@Cormoran I changed them to flowering at 10 days… I’m thinking it might be too much magnesium too… because I use dolomitic limestone
@Cormoran @Rogue let’s say it’s an excess of magnesium… What do you recommend me to do in this situation? Flush… Let it absorb and water only with water?
I don’t think too much Mg, should have dark green leaves, have you tested your runoff pH and ppm? This could give us a clue. I agree with immobile nutrients, only new leaves affected … 
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All you need is nitrogen
Nitrogen deficiency appears as a yellowing starting from the bottom leaves and progressing to the top. As @Cormoran stated, bottom leaves are fine, only new growth affected. Plants are now in their 10th day from flipping, so N is not so necessary in this flower stage, would only promote vegetative growth, not buds … 
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@George I don’t have the meters yet… This is a big mistake but I don’t currently have this access
Hi brother! Can’t help you 'cause I would not know, though I’ve seen growth related issues such as light green… I’d listen to the more experienced OGers here!! Best of luck!! 
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@George the older leaves are a dark bluish green hue… now they are canoe-shaped inward. like a channel… something like that hahaha… and with some ribs in a light light tone
That has all the symptoms of a phosphorus excess; bluish-green lowers, iron and zinc deficiencies from lockout, and as it progresses you’ll also see calcium and magnesium deficiencies. As well, the top leaves are small, thin and wrinkled. That may be due to the spirulina, which has a small amount of phosphorus, or it could simply be in your soil. The plant does start using less phosphorus as it progresses through flower, unless it’s been pollinated.
-chart courtesy of @lefthandseeds
I’m not sure if flushing them is the right call, or if you should just stop adding spirulina, or what to do about it; but the chart says it’s a phosphorus excess. If you flush, you’ll probably flush out all of your nitrogen as well as many other nutrients - I’ve done it myself. 
The plants don’t like it much. Sorry that I can’t be more help, but at least you know what it is now… and I guess knowing is half the battle? Go Joe! 
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If they are tacoing that means they have heat stress, they expose less surface to heat to preserve the humidity they have.
I’ve seen white bloatches (foliar spray under lights?) and curled munched leaves behind (bug activity?).
I asked for the pH in runoff because if too much dolomite lime soil can get too alkaline, nutrients like Iron could be out of range and possible root damage.
You should get those measures, right now it’s like riding a bike without helmet 
, that data is crucial if you want to know what issues you may have …
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@Cormoran the image is not loading for me, maybe it’s something on the ground because I don’t know exactly how the quantities of each element are… but I used very little spirulina…
already the phosphor in the ground is a mystery… fuck that I applied more thinking it was deficiency…
because it contains silicon and it helped me a lot in a previous phase… what a mistake… big mistake I’m really injured
@George I’m going to buy a simple pH meter
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Do you have an EC meter? I know your lights are not close but would check this anyway … 
This is the image, hope you can see it
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@George I don’t have any kind of meter… 
@George wow… I’m going to read this link about lighting, I’ve moved away the panels from the tops they are stretching too fast…
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I was told both were the first thing you should have if you want seriously to grow, right now there’s no way to know if your soil is too hot or poor, have a nutrient lockout, pH out of range or whatever may happen … 
Without those numbers it’s not easy to make a diagnostic, I’ve found in that site a great help to detect problems, hope you enjoy it …
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