Thank you all for your help. You made me to understand the very basic of electronics.
So having 7 x 3.5 ft grow area (let say 25sqft) and running 4 of those lamps with HLG-240-C1750 drivers will give me approx. 40W/sqft ( 4 x 250.25= 1001W : 25 sqft = 40.04 ) More than happy with that
Case closed (unless somebody has better idea)
So having 7 x 3.5 ft grow area (let say 25sqft) and running 4 of those lamps with HLG-240-C1750 drivers will give me approx. 40W/sqft ( 4 x 250.25= 1001W : 25 sqft = 40.04 ) More than happy with that

Case closed (unless somebody has better idea)
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