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

[tazztone]

i found these while browsing digikey for LED modules.
they have a 2 LED rows (1 row 2700K, 1 row 5000K).
they are tunable (CCT selectable). they have 2+ and 2- connectors.
Efficiency: 129-135 lm/W
1ft/280mm: 5.6$, 1600lm
2ft/560mm: 10.7$, 3200lm
not sure how they measured the lumen... i think at either 2700K or at 5000K.. so both together would add up to 6500lm (560mm)
LINK: https://www.digikey.com/products/en/opt ... V=ffece668
here is how the VESTA spectrum (black lines) (2700K/5000K) compares to EB gen2 (white lines)(3000K/4000K/5000K):
(colored = PAR curve)

i bought 1 pc 280mm and my strawberries are going crazy under it.. maybe because of the spectrum shift to the right/red.. maybe i should buy more of these instead of the samsung F562B 4000K 80CRI ?

*UPDATE: look at livinglights calculations (YPF/watt), comparisons and graphs, on page 3 of this thread

[infosponge]

It looks to me like they have lumens for both listed, so would it be ~6500 total per 560 mm strip?

https://www.bridgelux.com/sites/default ... ev%20A.pdf

[tazztone]

so would it be ~6500 total per 560 mm strip?

this would be 6500lm/10.7$=607 Lm/$.
compared to double-row F-series: 9000lm/27.1$=332lm/$

[infosponge]

Efficiency for the F series is a lot better right? 180 or so compared to 130

[tazztone]

Efficiency for the F series is a lot better right? 180 or so compared to 130

this might only be because of the fact that when we look at efficiency we measure lumen/watt, not PAR/watt. Lumen are for Human. correct me if i'm wrong. but i think i'm gonna order me some more VESTAs . also i like my plants to appear in the correct color to my eyes

[infosponge]

I’m with you, but I’m trying to figure out how best to set it up. I’m thinking seven strips for a 2 x 4 set up, using the constant current driver, HLG-185-1050, for each and wire the 2700 all to one and the 5000 to the other. Would that work?

[tazztone]

using the constant current driver, HLG-185-1050, for each and wire the 2700 all to one and the 5000 to the other. Would that work?

since i am a noob, using 2 drivers is the only way i can think of that enables us to benefit from color temperature regulation. but i think 1050mA is too much for 1 row. it should be half that amount.
i actually bridged my 2 rows together because i wanted to use both rows without CCT-changeability

[tazztone]

what also makes these interesting is the 2700K/5000K mix. since these temperatures typically produce the highest (A)PPF values.

*this chart is for COB's but might still be applicable.

Active-PPF. VESTA spectrum superimposed (grey)
anyone cares to guesstimate if these strip are worth it? is 130lm/W too much of a trade-off compared to let's say 80CRI LM561C 180lm/W? 90CRI LM561C would be at around 140lm/W
again: also consider their price:
VESTA: 10.7$ for 192pcs of LEDs = 0.06$/LED
VS
F564B: 27.1$ for 144pcs of LM561C = 0.19$/LED
3x cheaper per LED

[Osash78]

it is 3x cheeper but u need aprox 3x more... no?

[J.R.R.Toking]

I've done a ton of research on the mixing of LED temps, and the general consensus is that adding, for example, eual amounts of 3000k and 5oook essentially just gives you 4000k light to your canopy.

Again, not MY information, but responses of folks who've grown a lot of LED runs, including side-by-sides...FWIW.

Have at it, though, and let us know what you find out.