Bridgelux Eb series driver issue

[Shimbob]

True that 9S3P would produce ~183 watts of light, vs 8S4P ~161 watts. Use the 5 leftover strips for side lighting?

[Mickymouse]

I wired them up as 8S4P before I saw these last replies and everything has worked great. As for loosing 20Watts, as I will turn the light down to match the rest of the lights will it make any differnce. The rest are now turned down about 20%. So if this is running at 100% they should all be at the same power shouldn't they. Without me needing to change the wiring. Thank you for explaining it to me though. Next time if I need to rebuy the 1 foot strips I will know how to get the most power out of them.

[crazyphil]

Ok Micky, let's make it simple

2019-03-16_17-39-41.png (11.77 KiB) Viewed 724 times

1/ You have a CC (Constant Current ) driver, from witch you can tune the Current from 525mA to 1050mA , the Voltage will adjust automatically as long as it stays in the range of your driver 95-190V

2/ You have strips that ideally run @ 350mA
You can easily see that 3 x 350mA = 1050mA witch is the max of your driver, so we have our 3P. Nothing could be better!

Now let's see How many we can put in serial

Running @350mA, the Led would Ideally "want" 19.5 V

Let's see......... : 190 /19.5 = 9.7, so easy , a 9S will be good, it will take 9*19.5 = 175.50V delivering a 175.5V*1.05A = 184.5 W (with 27 Strips)

Actually, you run 4P, so you are running the strips @ 1050/4 = 262.5mA each
at 262.50mA, this should ask 19.2V each x 8S = 153.60 V your actual system @100% delivers 153.6Vx1.05A = 161 W (with 32 Strips)
When far away from the ideal, all this stuff trends to give up some efficiency.
With this model : HLG-240H-C1400B
running 8s4P , you would run 350mAx4, on 19.5V x 8 = 1.4A x 156V, giving a on 218.4 W, running the led @ there nominal value


CQFD (QED in english)

[Mickymouse]

So yeah like I said, I can run it at 100% and would achieve the same thing as wiring it 3 in parallel as it will be turned down 80% anyway. Put simply.

[crazyphil]

No way to say it simpler if you want 160W out of a 200 w + Board, that's the point I missed since the beginning of this thread !!

[Mickymouse]

There are two drivers per board with 32 1 inch strips so at 160 Watts I'll be getting 320 Watts which should be perfect considering the 11 other lights running 400 Watts each with the same two drivers per board. As you can imagine it's way to much power and so they have all been lowered to 80%. So yes il will only be wanting to use 320 Watts for this light. I only needed to know how I can get the drivers to power the strips as I was unaware I can divide the drivers power between series wiring and I was unable to do this in series like I was with the 2 foot strips. I guess you missed that from the beginning of the thread. I hope I made it simple enough for you.

[Shimbob]

2) i don't think there's anything specifically ideal about running them at 350mA, it's just an arbitrary number they used to show the relative performance of the LEDs. They could well have used 300 or 400mA and all the charts would be calibrated to that value. In the end, lower current = higher efficiency.

[crazyphil]

@ Shimbob, That's a point for sure I wasn't aware of, I will have to study more carefully the curves relations between lumens/W.
I was ingenuously / naively thinking this nominal A value was kind of the most efficient. My mistake so!!

[crazyphil]

@Mickymouse

I hope I made it simple enough for you.

no need to be sarcastic, i just missed the goal, and misunderstood your needs in clarification.