new bridgelux model? VESTA® 90CRI, 130lm/W

[tazztone]

F-series vs VESTA (at 25°C):
F564B: 128 umol/s of photons (used the same conversion factor as for EB Gen2)(and Samsung LED engine calculator to match 49.6W and 25°C)
VESTA: with only 2700K LEDs (because 5000K calculation is missing) we would have 112 umol/s of photons.
photon output difference between VESTA and F564B 3000K is 14% @ 49.6W.
the price difference on digikey is 61%
or 56% for 10pcs
or 50% for 25pcs

the next step would be weighing the photons at each wavelength according to mcCree curve to get YPF, right?

[LivingLight]

F-series vs VESTA (at 25°C):
F564B: 128 umol/s of photons (used the same conversion factor as for EB Gen2)(and Samsung LED engine calculator to match 49.6W and 25°C)
VESTA: with only 2700K LEDs (because 5000K calculation is missing) we would have 112 umol/s of photons.
photon output difference between VESTA and F564B 3000K is 14% @ 49.6W.
the price difference on digikey is 61%
or 56% for 10pcs
or 50% for 25pcs

the next step would be weighing the photons at each wavelength according to mcCree curve to get YPF, right?

I just edit my last post to answer the question about McCree curve but yes you're right.

I'm gonna give you the calculations for the 5000k give me some minutes

[LivingLight]

[tazztone]

4.723 umol/s of photons per $ of F564B strips
10.47 umol/s of photons per $ of 2700K VESTA strips
Vesta gets you double the amount of photons per dollar.

[LivingLight]

4.723 umol/s of photons per $ of F564B strips
10.47 umol/s of photons per $ of 2700K VESTA strips
Vesta gets you double the amount of photons per dollar.

What is this F564B?
is it the F-serie gen3?

[tazztone]

yes. the double-ROW version, 560mm. https://www.digikey.com/product-detail/ ... ND/6624005

[LivingLight]

yes. the double-ROW version, 560mm. https://www.digikey.com/product-detail/ ... ND/6624005

okay, i see one problem, the samsung data are measured at Tj=65°c (probaably stabilized) when bridgelux ones are measured at Tj=25°C pulsed
It can make a difference.

Here are my results for the 560mm vesta using both 5000 and 2700k at the same current:
calculated color température : 3500k



for approximately 10$ worth the price

[tazztone]

nice combined graph! but too bad it's cut off at 750nm

the samsung data are measured at Tj=65°c (probaably stabilized) when bridgelux ones are measured at Tj=25°C pulsed

i didn't take into account stabilized vs pulsed, but i used the samsung led engine calculator to match the F-series to 25° and lowered amperage to match the vesta's 49.6W

so how did you get YPF? multiplying the combined graph with McCree curve?

[LivingLight]

The samsung simulator gave me 178lm/w for the F564b at 25°C and 49.6w
Using a samsung LM561c 3000k 80CRI spectrum assuming the F564b spectrum is close to:

[LivingLight]

so how did you get YPF? multiplying the combined graph with McCree curve?

Yes exactly (not exactly just beware to use the photon spectral density and not the power density), or you can simply use the photosynthetic efficiency rate in the tab i gave you and multiply the Photon flux by it. At the end it's the ssame
for the vesta the only difference is you got to weight the two kind of leds