Understanding driving DIY LED's

[b4tn]

I am considering modifying my ORT247 lights with a better driver, Cree LED's, and adjusting the spectrum a bit. Near as I can tell the OR light uses 48 total 700mA LED's. Each driver controls 24 of the lights and is a 550-600mA 70-90v driver (under driving the lights?) If I am understanding this correctly, for a constant current, series LED setup for 24 LED's, thats 3x24=72v. So to drive 24 700mA LED's I need a variable voltage driver capable of 72v with a constant current of 700mA

I found this 700mA 53v-107v meanwell driver that will dim to off with 0-10v PWM This should just drop in correct?

https://www.jameco.com/z/ELG-75-C70...3-in-1-Dimming-Function-IP65-PFC_2250097.html

 

[theatrus]

I am considering modifying my ORT247 lights with a better driver, Cree LED's, and adjusting the spectrum a bit. Near as I can tell the OR light uses 48 total 700mA LED's. Each driver controls 24 of the lights and is a 550-600mA 70-90v driver (under driving the lights?) If I am understanding this correctly, for a constant current, series LED setup for 24 LED's, thats 3x24=72v. So to drive 24 700mA LED's I need a variable voltage driver capable of 72v with a constant current of 700mA

I found this 700mA 53v-107v meanwell driver that will dim to off with 0-10v PWM This should just drop in correct?

https://www.jameco.com/z/ELG-75-C70...3-in-1-Dimming-Function-IP65-PFC_2250097.html

Correct. The Meanwell unit should work well.

Note that in order to get to higher power the cheap fixtures generally need a cooling upgrade, hence they're under-driven from the factory.

 

[b4tn]

When you say cooking upgrade. The light already has a heat sink and two fans. Are you say the heat sink needs changed?

 

[Jacked Reefer]

I feel ocean revives are cooled pretty well. You could try upping the rpm of the fans or add one or even two more but that would be way overkill. Does the power supply have the capacity to run the driver(s)?

 

[b4tn]

I feel ocean revives are cooled pretty well. You could try upping the rpm of the fans or add one or even two more but that would be way overkill. Does the power supply have the capacity to run the driver(s)?

@Kayden Hutchings the meanwell drivers in the link above are power supply drivers. They take 110v input so the OR power supply won’t be needed anymore.

 

[Jacked Reefer]

Oh wow did not see that! I want to see how you hook these up to the dimming system. Maybe I could do something like this

 

[b4tn]

@Kayden Hutchings these drivers will not work with the built in timer and dimmer. It outputs a 0-3.3v pwm signal and the meanwell driver uses a 0-10v pwm. The whole thing that started this is I want to control the lights with my raspberry reefpi setup but the built in drivers do not dim below 10%. So I figured I would look into replacing the drivers.

 

[Jacked Reefer]

Even though I have built a diy fixture I’m still an electrical noob Lol. Well back to square one. But good luck with your setup anyways. How are you going to change up the spectrum?

 

[Diamond1]

Very interesting.
Would the drivers you mentioned work with the existing OR leds and the reef-pi lighting module?
I'm considering taking mine all the way apart and doing a diy fixture that would put the OR arrays end to end with 2 or 4 t5s for supplements.

 

[b4tn]

Even though I have built a diy fixture I’m still an electrical noob Lol. Well back to square one. But good luck with your setup anyways. How are you going to change up the spectrum?

I still need to read into it a bit but basically just change out LED’s like sway the red and green ones for blue or UV. Maybe arrange how many blues are on the white channel etc.

 

[b4tn]

Very interesting.
Would the drivers you mentioned work with the existing OR leds and the reef-pi lighting module?
I'm considering taking mine all the way apart and doing a diy fixture that would put the OR arrays end to end with 2 or 4 t5s for supplements.

@Diamond1 in theory the LED’s that are in the fixture now should just be standard 700mA LED’s that are under driven by the fixtures 600mA driver so yes, this driver should drive them. They are 0-10v pwm though. So the pi pwm would need converted but it would be identically to the kessil circuit @Ranjib made

 

[Diamond1]

Very good thank you sir.