i think you should get heatsinks locally
thats whats killing u on shipping
even if you use pc heatsinks and dont run the fans(although u could use the fans to circulate air in the space as well) it would be cheaper
plus your english sounds like you are in the EU so the VAT will fuck u an...
i think everybody missed that you are on 240v
you can use 1 elg-150-1400mA (240v version and cheaper than the hlg) and run 3 cxb3590s
that will be a sweet 150w set up for your space and is also dimmmable
56% eff and 950 ppfd
strange nobody has mentioned the APC meanwell drivers
cheap as too
in ur case i would use 4 of the cxa2530s from fastech
options which id recomend is to grab
2 cobs
2x https://www.fasttech.com/products/1734701 and run driver per cob
and
2x https://www.fasttech.com/p/1348407
44watts/ 800...