Lm561c Strips & SunPlus 35 design/manufacture help

GrowLightResearch said:

The Bridgelux Gen 2 seem to edge out the F-Series in lm/W and beat them hands down in cost.

Samsung SI-B8UZ91B20WW typical lumens per watt = 171 lm/W $26.51 (single row)

BXEB-L1120Z-35E4000-C-B3 typical lumens per watt = 175 lm/W $14.06

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The $26 Samsung strips (all of them) are 144 diode strips rated for ~8800 lumens. The Bridgelux strips are 112 diode strips rated for ~4700 lumens. That works out to per lumen cost of .301 cents per lumen for Samsung vs .308 cents per lumen for Bridgelux - close enough to be a wash, but favoring Samsung slightly. Also consider the currents at which they are rated. Bridgelux rated test current is 50% of their given max current. Samsung's rated test current (125 mA per diode) is 62.5% of the LM561C's published max current of 200 mA. Running them at 25% lower current will equal or exceed the Bridgelux lm/W rating.

When you dig a little deeper than the cost per strip and the published lm/W ratings, it becomes obvious that neither one is heads above the other in either initial cost or running cost. Both are excellent products of literally equal value and cost to run.

nfhiggs said:

Both are excellent products of literally equal value and cost to run.

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That was an excellent explanation. I totally agree.
I've got to go back over my figures. Looks like I was wrong.
$14 / 4780 lm = 0.0023 @ 700 mA x 39v = 27.3w = 175/W
$26.50 / 8800 lm = 0.0030 @ 1120 mA @ 46v = 51.52w = 170 lm/W
My head hurts working all these numbers.
It's a close call. When it comes to results, no one would be able to tell the difference.
I bought both strips and went with the BX Gen2 becasue they ran cooler and a string (7 LEDs) was out on one of the Samsung.
I bought more BX Gen2, and house plants, and the Samsung...

nice light setup