There are plenty of good reviews on
Ocean Revive Arctic S026/T247 as well as reefbreeders LED fixtures..
Just like anything in life.. A company can choose to price their products at whatever they wish.. You don't really think your $700 Apple Iphone costs anywhere near that to produce do you..
Now some companies will have more $$$ in Research/Development that they have to recoup, marketing dollars, support staff, etc... But in general the high dollar aquarium LED companies charge that much because suckers keep buying them at that price.
Personally I'm a Walmart philosophy type of guy.. "Sell em cheap and sell em by the truck load"
Nothing brings costs down like volume..
A $50 enclosure that you buy 25 at a time drops to $10 when you are buying them 500 at a time