On Kingbrites? I agree with Aqua about the heat sink, and if some of the diodes aren't top bin I wouldn't know how to tell. But I haven't seen the immediate failure/ 6 month failure/ warranty not honored with them.
To me, given similar enough operating costs, lights boil down to a relatively simple formula.
Gross cost/ watt: warranty years
A 240w Kingbrite will cost around $200 shipped, $0.83 per watt. The warranty is for one year, so the ratio of cost per watt to warranty year is $0.83:1.
A 260w
HLG is around $350 shipped. That's $1.34/w. Their warranty info varies product to product on the site, so for the sake of argument we'll assume that it's the same 3-year one they offer with their new lights. Then the
HLG comes in at $1.34:3, or $0.45:1.
So if the
HLG lasts 3 years and the Kingbrite lasts 1 and I have to buy a new one, it's more cost effective to go with the
HLG.
But! The cost per watt on the kingbrites improves over the second to $0.41 and, assuming it lasts that long, to $0.27 third year.
So if a Kingbrite light works for 20 months and needs to be replaced after, it's still more cost effective than the
HLG.
Also, keep in mind that the LED market has been evolving rapidly. Would I want to be running a 3 year old light when so much has changed in the last 18 months? Do I want to pay top dollar for something that might be essentially obsolete in 24 months?