How To Use Progressive Web App aka PWA On 420 Magazine Forum
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I would probably go with a 400. It works both flower and veg. Not sure of pricing in France. Go the Mars-Hydro.com and you can see what it would be with shipping in your area.
It's not about how many LEDs you have. They are all 3W LEds in all the reflector series. You need the distance to get the light to spread. If you can manage to keep your canopy very even (like +-2-3"), you might get away with the 12" I said is a minimum.
When you look at the specs for these lights, you see a coverage estimate. That is based on the recommended light height. If you put the lights closer, you reduce that footprint.
The reason we're recommending the reflector series is the 3W diodes don't penetrate as well, but you don't need that with a scrog. Also, the reflectors do an awesome job of spreading the light without a lens which makes them very efficient.
As far as the size of the lamp, I'm an advocate of getting the smallest size lamp you want and then get as many as it takes to cover your area, ie more small lights instead of one large one.
Yours space is 'vertically challenged', so you're going to have to adapt. You need a low profile and wide container for your roots/media. Get your scrog as low as possible. Make as many nodes at the screen as you can, then defoliate early into flower to minimize any stretch. You might be OK.
A Mars II 400W would do well in that space.
I put one in 2-8 and it's still processing... so hopefully it will clear up soon. My little gals are stretchin hard!
Can you reccomend a pot that would be low profile like you are describing. I currently work in 3 gallon pots...and run 2 plants at a time.
I am hell bent on LED!
So here are some photos from past runs that might help.
The box is 3 feet tall, I have a carbon filter and inline fan installed INSIDE the box. I am open to the idea of trying to relocation the fan outside of the box.
Imgur