help!!! think i set up my room wrong, bad lighting???

hi, heres some photos of my room, not the best photos sorry, what it is is ive set my lights up in a row up the middle and im wodering if im loseing lummens, ive 9 blue mystic growing and theyre on day 15 of flowering, as this is my first grow ive made loads of mistakes but with a lot of reading and advice on here ive made it this far!!! would it be more efficient to have them bunched in a corner for reflection? but i dont how close you can sqeeze them together?? ive 2x 600 hps 1 is a cool tube with its own fan, 1 is a poot light, ive a 700cfm3 exhaust filter and 2x desk fans, a 250cfm3 intake and a couple of passive inlets, my room is 2.7m long 2m wide and about 2m tall theyre in 25 ltr pots and im using bio bizz all mix soil, bio grow, bio bloom and a pk 13-14 and they are STILL ALIVE!! lol, has any one got a view on what the best set up for what ive got ie bunched or a line like i have, i know every rooms different and the best way is to just get on and have a go, but peoples views are much apreciated, after all we all want the best for are plants!!
thanks
cozz

looks good, same size as my flower room,just a couple of little things
1... lift duct , thats on end of cooltube, so no shadow ( in last pic)
2... try to shorten+straitern duct from carbon filter to exit(not important) but may need next size up,
3... get one of the fans up to just above canopy level , blowing across tops of plants
4...idear,up grade,: chinamans hats would work good in that space,(but dont fix if it ant broke).
good growing to u , are u going to keep this as your grow thread, if so im sub +rep

hi, thanks for taking the time to have a look, i reckon youve made a couple of good points, ill defo be getting a pedestal fan, and will get more ducting to sort out the cool tube, the filter is only a few inches away from the fan, the fans in a cardboard box as was a bit noisey, this runs down the wall then into a 4 ft home made silencer which exits as quiet as a mouse i must say well worth the 20 mins effort to make, havent seen the chinamans hats?? will look at them tho, been looking at the nova hoods for the air cooling as in hot weather some temp issues now and then, and feel the cool tubes might not give of the best light?? anyone got any points on this?? as far as a grow thread goes ill try my best to see how to do one as it would be cool, as i say im on day 15 of flower but have some pics of them from germination, ill look into it tonight so keep it in mind, are you doing one at all?? as you say its about the same size id be interested to see if theres any great ideas i could nick!!! lol,
cheers
cozz

I dont have a grow thread , hear is some pics
https://www.rollitup.org/members/mississippi-227477/albums/end-grow-1-12808/
I'v got 1x1000w in cooltube+ a 400w just hanging down for side lighting .
I like the cooltube, lots of ppl dont because it takes 5% of the lumes , but if u can get 30% closer (less heat) I think thats a +

Side by side or in a line will both work. The question is how much do you want their coverage areas to overlap? You will get more overlapping with them side by side, but you can also hang them a bit farther apart for that same reason. With in line you don't get as much overlap, but you also get a smaller coverage area in terms of width. The benefit of the overlapping is that the plants that are put into that area are going to receive double the lumens they would get from a single light at the same distance.

With all that said, it really depends on the shape of your grow room and the size/bushiness of the plants your growing. The blueberry I'm growing are between 3-4 ft tall at harvest and around 2.5-3 ft wide, so It's hard for me to get more then 4 of them into optimal range of a 600w light no matter how i set them up.