I think if I were to buy something like that I would take a hard look at HLG.
I was looking at HLG when I was in the market for a light. They have good products but comparing the spectrum of HLG to budgetLED I went with budget. The OP said 300 was what he was working with and while budget costs more for the size he needs HLG would be even more.
Take a look at @Dutchman1990, he switched from Mars to BudgetLED if I remember correctly to see some results.