For your space it would be very easy.
You could use
4x citizen clu048 1212s ($10each)
4x 120mm pin heat sink ($10each)
1x meanwell hlg 185-c1050 ($30-40)
You simply use thermal adhesive to attach the cobs (citizen 1212s) to each pin heat sink.
Solder the positive wire of the driver (meanwell hlg 185c1050) to the positive on cob 1, solder negative cob1 to positive cob 2, repeat till the cob 4 negative goes to negative on the driver. Its a very simple circuit that requires about an hour to do or less.
You then need a small amount of aluminium frame to hold it all and hang it. You would also attach an earth cable from the frame to the earth on the driver plug.
It would make the world of difference, not only would that only use 156w of power but it would be very powerful.
Its very easy to make and very safe. It will last a decade or longer.
This is pretty much what us LED guys use to grow with these days. It can be expensive but because your only in a 2x2 its really cost effective.
Although I mentioned digikey earlier, the best option price wise would be kingbrite on Alibaba for all the parts in one parcel. They will deliver to Saudi.
Check out this guys vids to get a better idea of what these lights can do.