The cost of an high quality LED unit, is definitely higher than "commercial" products you know(most come from the same place)and it is obvious, but it is also much more performant, ensuring real powers, best spectrum, and can be guaranteed to last for many years without any problems, with only easy maintenance.
Also in case of problems you can fix it alone with commercially part or you can upgrade with new compatible parts.
In my opinion, if I make this type of investment, this must continue to maintain this value throughout its life,and must guarantee the results.
Personally on the scene of a purely commercial, would not buy anything,
in general there is no value, the most interesting projects and performance remain DIY user project and product...