Hey bud
My space here.
View attachment 945476
Currently 1m tray and 1m parabolic light.
So width is maybe more like 1.1 x 1.2
Height is approx 1.5m in height, I will need to measure again, memory is like a sieve.
Edit ( the height is actually 1.8m, from top to bottom) probably looking at approx 1.5m from the top of my 15L pots.
I was thinking a 600w led in this space and turned down if required.
Dude your space is awesome, kudos on your design and set up. Nice and tight...
your idea of 600w might be perfect, you could then fill that space wall to wall.
Something to think about which has not been mentioned, well
@pop22 is touching on it is how hard you drive the broads. You have height restrictions like me so you need to give the plants some leeway in the stretch and let them get close to the lights. If your driving those board at full power 100w + with lets say 2100ma driver your gonna want at least 18" from the canopy, some would recommend 21".
What I suggest and this what I've done for 2 of my set ups, (my tents are only 145cm tall, come on over to the garden man and check out my spaces, I'm doing the same as you but in slight tighter corners) is to drive the QB's at a lower wattage 50w each at 1050ma (no dimming), you could probably just about get away with them at 75w each (1400ma) but some auto strains may shy away from that much light and need a wider gap between canopy and light (that's not all auto's some lap the light up like its going out of fashion). If you drive at 1050ma you can get those lady's with in inches from the light if they decide to get away from you and some of those auto will. On average in my tents the girls get to with in 5" at places and never a problem... I'm growing photo's at the moment
configuration's I would consider
4 x QB288 @1400ma in series... 1 x meanwell HLG-320H-1400
or 6 x QB288 @1050ma in series... 2 x meanwell HLG-240-1050 ... personal this is what I would go for to spread that light out, get into the corners and let those lady's get that littler closer... This also could be wired in parallel to save you money with one constant voltage drive, this not my field I've only wired in series so I can't recommend which driver to use. Don't worry others on this thread can.
Once you have decided on the tech I got great link for you with an Aluminum chop shop in the UK that you can make your frame from. Its the cheapest part of the build pimping your frame... Here a pic of my latest build... those 3 QB's are at about 50w @1050ma (HLG-185-1050ma) the cobs 8 x citizen 1212's @ 1050ma (HLG-320-1050ma). Over all the light is 450w, a little over powered for the space (117cm x 87cm x 145cm). I'm up grading my space very soon so I'm over rating every thing ready for my move.
Alien Rift by Ocean Grown