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I use this one: VM(?) 1988 Spectral Luminous Efficiency Function for photopic vision > https://www.rit.edu/cos/colorscience/rc_useful_data.php From which I made this file to extend the curve to 800nm:

Using the datasheets for LM301H (70-80-90 & ONE) and using the following values for the electrical input: - 2,7V - 0,065 A I found, using the average values for lumens output for each color temperature and each CRI the following data: So I think that the correct efficiency values are around...

I don't remember where "Stardustsailor" buy his leds. Does anyone remember the on-line shop where I can find and buy Edison S series leds ?

For PAR 400-700nm the radiant flux is : 358 Watts & 1750 umol/s

For Standard HPS - 2200K - 140000 lumens - 1000W, I find : - Radiant Power 399.79 Watt & 2006.62 umol/s - LER = 350

Do you try OSLON SSL leds, they seems to be more efficient for green and amber.

I will compute the Radiant Flux, umol/s, LER this evening. As Photopic Curve min = 360 nm and max = 830 nm these calculations will not be as accurate as I want

My XTE White charts were false ! So with the good values : XTE 2200K Power in : 1.00 W (2.85V x 0.35A) Luminous flux : 123 lumen Efficacy : 123 lumen/W LER : 309 lumen/W > 305 Radiometric eff.: 39.8% Radiant flux : 0.40 W > 0.403 W Photon flux : 1.99 umol/s (2.00 per Watt) > 2.02 umol/s Blue...

Find me a good MH & HPS Relative Radiant Power Chart and I will do the job

For the others it's good :-P

I think we don't use exactly the same charts for the XTE White 2200 K to 3700 K

XBD 2600K Power in : 1.00 W (2.85V x 0.35A) Luminous flux : 114 lumen Efficacy : 114 lumen/W LER : 325 lumen/W > 324.09 Radiometric eff.: 35.1% Radiant flux : 0.35 W > 0.3517 W Photon flux : 1.70 umol/s (1.71 per Watt) > 1.71 umol/s Blue : 11% power...

For all the calculation I use Tj=50°C

To find radiant flux (Watt) from lumen, I use this equation: lumens = 683.002 x Sum ( Vi x Pi x di) With : Vi = Photopic CIE 1931 Pi = Relative radiant spectrum di = delta nanometer I first normalized the Relative Radiant Power between 300 and 800 nm I compute the area under this curve for 1...

I apply the same equation so the problem come from our lumens to watt computation.

And If I understand the LER, my computed LER for XTE Red is = 185

But the Radiant Power always deviate from your computation ! XPE red Power in : 0.77 W (2.20V x 0.35A) Luminous flux : 73.9 lumen Efficacy : 96 lumen/W LER : 201 lumen/W Radiometric eff.: 47.7% <> 53.5% Radiant flux : 0.37 W <> 0.4122 W Photon flux : 1.94 umol/s (2.52 per Watt) <> 2.17 umol/s...

I use Photopic CIE1931 values

Oups, I use Red-Orange XPE not Red one. Here my raw data : Decimal point = "," & Separator ";" 571,613607990013;0 571,832084893882;0,0011350737798 573,361423220975;0,00227014755959 576,201622971286;0,00340522133939 580,13420724095;0,00454029511918 584,066791510613;0,00567536889898...

For the others VERO & XML I don't have the data