Eb strips Coco and how much height do I need?

[cobshopgrow]

not really if i still want my 1200ppfd in flower.

 

[christopher jordan]

Lol
My question wasn’t about distance from led to canopy actually

It was about total hight needed in flower chamber

And I assure u if I was getting aggressive u would know about it

To be fair Weed-whacker is an aggressive cock sucker.lol

 

[Horselover fat]

not really if i still want my 1200ppfd in flower.

Well I dunno. I can do 1200ppfd at almost 94% efficiency or down to 222ppfd at 90% (25% load). The driver is 89% efficient even at 10% load... it does dip down to 87% at 20% load though to be fair.

 

[wietefras]

exactly, i wanna get the 95% over the whole range, yes.
...
Lets assume we have a led like the bridgelux driven allready very low, below 700mA max.

I'd say you still lose a lot more in efficacy on the led at 700mA compared to 350mA than you lose on the driver. You really need to be dimming below 30% and at that point you are better of using two drivers and switching one of them off (switching off half of the strips).

Anyway initially i just recommended something which can dim lower then 50% if youre aiming for a low hanging height.[/QUOTEHanging height should not be related to dimming though. Hanging height is determined by the distribution of the lights. When you hang the light at the optimal height for it's construction and correct light distribution then you dim (or not) to change the intensity.

 

[cobshopgrow]

not sure about that.

can be, but if this the case the it still applys, set 100% duty cycle to 350mA and go from there.

i know this case is a bit specific as normally leds gain more beeing more underdriven, you are of course right in general.

the datasheet data can be complete rubish there too, maybe they simply didnt measured below a certain point or whatever.
but i just can work with this.
they maybe also not really taking into account that the lower drive current means gains due to lower heat emitted, idk.

to my "problem" which is none really.
i was just in the situation needing to draw only about 20% of the 320w driver, in this case, duty cycle set to 525mA and dimmed to 20% would have been better seeing the curves.
yes splitting the drivers could be one option, while the smaller ones arent working as efficient as the 320w when you want 320w, well you know the curves, test reports etc.