Bridgelux thrive spd

[Salmonetin]

...thanks...

[Horst]

@Salmonetin

I can’t speak Spanish...so I dont understand ur point cause of language maybe

What is the idea behind so much channels and how u use it?

I think on 3/4 channels

VEG cri97 5000k + some 420nm
Flower cri90 2700k+ some 660nm
UV 365, 380,390 and 400nm
FR with 730nm .... but I am thinking about using the flower channel for sleep initiation. But I found only very rare infos about that.

Am really interested to understand ur ideas and why u decide to do so.

Greets

[Salmonetin]

..Thanks...

[Horst]

I like much information and long posts

Can I ask u what u think about the cyan gap? Would there be differences between 40-50 percent intensity of Max (cri90) and full intensity(cri97...) in your opinion?

[Salmonetin]

...thanks...

[Horst]

I like how u think about....

But one question....why u delete your posts? It’s sad cause nobody can re-read it.

I started at zero knowledge about led three month ago and it was always interesting re-read some things after a time with better understanding.

Really appreciate ur input
Greets

[Welight]

Seems we have generated some really good flow of information on this. I can share my testing on some 98 cri chips.
This was a single diode mounted on a star PCB and enclosed in 4inch PVC tube with spectral sensor on top, so around 10 inches from light source. All leds tested identical method with bench supply set to 70ma.
Results

So couple of points. I distribute Bridgelux so have no axe to grind, Im guessing these parts are incorrect and we are returning them. That said while they have the highest output at 70ma they also have the highest forward voltage. One concern also is the Thrive is max drive of 80ma so we are nearly maxed at 70ma. The clear winner on efficacy is Lumileds at 2.71v which along with a great spectrum makes it a really nice part. Spectrally the optisolis is a fuller and more complete spectrum. For me the Cree and the Lumileds are close for out of the box performance at around 70% of the cost of Optisolis
cheers

Thanks for sharing this info.

My conclusion from the posted info is that the Bridgelux may be the most efficient, if it was run softer at lower amps (Watts) it might still provide more light than the other LEDs. Bridgelux is approx;
4% more Watts and 11% more PPFD than Cree,
7% more Watts and 11% more PPFD than Lumileds,
4% more Watts and 34% more PPFD than Nichia.

The SPD Chart alone is not enough info, the SPD charts are sometimes misleading, they only show the distribution relative to the highest Wavelength output. The Percentage Wavelength Distribution (%B-G-R-FR), if also available could then be used to compare the actual spectrum content pertinent to use as an horticultural light. The SPD Chart does show that Bridgelux has more 420nm wavelengths that the other LEDs.

IMO, Quantifying horticultural grow light percentage wavelength distribution is Pertinent info that was usually misunderstood, lacking or completely missing but is now at least available with DLC Listed Horticultural Light Fixtures and the info can be extrapolated to DIY Fixtures.

on first glance you might take away that view. There is one fundamental constant with leds that drives efficacy and is the control point for all led evolution and that is forward voltage, the 50 LPW leds of 15 years ago vs the current 200+ LPW is the reduction in forward voltage, whether it be via die improvements, led packaging or phosphors etc. The Bridgelux is running at over 0.2watt, while the others are around 0.18 to 0.19W. My counter to your view would be that if I raise the vf of the Lumileds to a number still under 0.2 watt I would get a lot more PPFD than the BLX part. If I design a strip using parts like this, my first consideration will be spectrum due to the nature of these parts, but forward voltage is going to be key in offering both rich spectrum and best case efficacy to meet customer expectations. The first question asked when it comes to Optisolis I get is, is it as eff as 301B and off course it isnt, but you give up some eff to get a richer, fuller spectrum. The next point would off course be how can we translate all that in to meaningful Percentage Wavelength Distribution (%B-G-R-F) with products to find the ONE.
Cheers

[Horst]

@Welight

I needed a bit to understand ur point. But now I got it .... voltage is efficienty at the same ampere.
Very simple but very good. Am skittle ashamed thats didn’t get it on my own.

But at ur charts....if that are truly thrive leds than blx is a big scam. It’s very sad cause on paper the thrive are way better than the optisolis.
Led-tech.de have strips with 98 x thrive on 50cm but the smd version.

https://www.led-tech.de/en/50cm-Alustri ... connectors.

This version have a different spectrum and lower efficiency. Around 20 lpw less. Why there are two so different versions with the same name?

I asked led-tech.de to take this strip in the spd configurator to see. They measure all himself.

Compliments to cutter....best product I did see on my journey so far

[PeteR_1]

Thanks for sharing this info.

My conclusion from the posted info is that the Bridgelux may be the most efficient, if it was run softer at lower amps (Watts) it might still provide more light than the other LEDs. Bridgelux is approx;
4% more Watts and 11% more PPFD than Cree,
7% more Watts and 11% more PPFD than Lumileds,
4% more Watts and 34% more PPFD than Nichia.

The SPD Chart alone is not enough info, the SPD charts are sometimes misleading, they only show the distribution relative to the highest Wavelength output. The Percentage Wavelength Distribution (%B-G-R-FR), if also available could then be used to compare the actual spectrum content pertinent to use as an horticultural light. The SPD Chart does show that Bridgelux has more 420nm wavelengths that the other LEDs.

IMO, Quantifying horticultural grow light percentage wavelength distribution is Pertinent info that was usually misunderstood, lacking or completely missing but is now at least available with DLC Listed Horticultural Light Fixtures and the info can be extrapolated to DIY Fixtures.

on first glance you might take away that view. There is one fundamental constant with leds that drives efficacy and is the control point for all led evolution and that is forward voltage, the 50 LPW leds of 15 years ago vs the current 200+ LPW is the reduction in forward voltage, whether it be via die improvements, led packaging or phosphors etc. The Bridgelux is running at over 0.2watt, while the others are around 0.18 to 0.19W. My counter to your view would be that if I raise the vf of the Lumileds to a number still under 0.2 watt I would get a lot more PPFD than the BLX part. If I design a strip using parts like this, my first consideration will be spectrum due to the nature of these parts, but forward voltage is going to be key in offering both rich spectrum and best case efficacy to meet customer expectations. The first question asked when it comes to Optisolis I get is, is it as eff as 301B and off course it isnt, but you give up some eff to get a richer, fuller spectrum. The next point would off course be how can we translate all that in to meaningful Percentage Wavelength Distribution (%B-G-R-F) with products to find the ONE.
Cheers

Thanks for the reply.
Agreed, that is why the Percentage Wavelength Distribution (%B-G-R-FR) is so important for comparisons, it is not based on "Visual Appeal" of the SPD Chart it provides an objective quantifiable spectrum breakdown.

And you can show quantitatively how the "lower efficiency" High CRI LEDs actually provide increased percentages of Red and Far Red wavelengths compared to the "higher efficiency" LEDs

[bilabong007]

I want to test some of these thrive strips so let me know if they are available anywhere, without a big MOQ

I just built a wee cabinet for my wife using 3500k thrive units from digikey. Got 10, but moq was 1 and they had lots of choice in colour and size.