I think I'll pickup one of your lamps to evaluate. I use a 5x9 tent with a different LED vendor.
I have a spectrometer to verify the spectral characteristics and a quantum PAR meter to get some flux measurements. This is the spectrum I get from my current lamps:
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The current lamps use about 230 watts ( I use one per plant ) get great penetration ( often a bit too bushy ). Unfortunately - I don't usually gather gram/watt data because I cure whole branch and recently - whole plant - to get a better smoke. All that branch and stem stuff fucks up that measure-product plan. But I don't really care about the economics of it so much as not letting some other grower put shit on the weed I smoke and share. We may have recently un-fucked the compassionate giving laws where I am - I'm more into that scene anyway.
I digress.
I think the small lamp or perhaps one of the slightly larger sub-200 watt models.