The Loafter
Well-Known Member
There was one in stock at Newark . wont work for these strips unfortunately
Samsung H series strips, Arrow seems to be blowing them out! what a deal!
- Thread starter haze010
- Start date
getogrow
Well-Known Member
Can you send me a link of any good tests? i dont doubt you at all. im just saying that you can do it with that spec and do great. most of the grow forums think all of this stuff is seeable to the naked eye and 90% of it is not. (in the 90's they said hps was shorter and bushier vs mh which caused more stretch an airy buds....now i think its the other way around , folks saying that the more red the more stretch or something like that.....im not sure but i doubt the naked eye will yield you much between 3k and 4k but i could be all wrong and proudly admit it.There have been many side by side grow journals done testing spectrum, results speak for themselves. Theres a reason people pick 3k for flower.
This is what im talking about ....people thinking one or the other will not work at all..... people are skipping the basics of growing and jumping right into kelvin temp having to be certain a certain temp or water coming from a filter or plant food for weed..... shit like that.If you are hitting almost 2g per watt using 4000k I would think you just proved the spectrum doesn't matter as much as having lots of it
Im no rocket applience so i dont know much either
J232
Well-Known Member
700 yesterday, 250 left today, they will be gone pretty soon.
haze010
Well-Known Member
AHH ok, i missed that. When i look it up it says its $327.
haze010
Well-Known Member
Yeah when i found it there was 100 @3000k and 1700@4000k. I need to call arrow and ask for some kind of commission haha. 1600+ sold in a few days.
J232
Well-Known Member
That was the link to the f series 2 footers I commented on, same with the H’s though I saw.
haze010
Well-Known Member
Yeah even the 4k in the H is sold out now.
J232
Well-Known Member
Damn, there was hundreds of those yesterday too. I grabbed 26 of the f series in the other thread @$1.99.
haze010
Well-Known Member
They were such a crazy deal people were buying an extra 100 just in case. The price just days before and days after was no exaggeration 10x the price. I know i only needed 18 strips for what i originally was looking for but i bought an extra 50 and still paid $100 less than i thought i was going to.
As far as I understand, either cc or CV drivers work, it really is just about how you want to wire them up, in series, parallel or series/parallel.
Sorry I'm not the best at explaining these things and should probably just bow out and let the big boys handle it, but just trying to offer my little bit of knowledge.
getogrow
Well-Known Member
im thinking out loud again .....
but if i run 48 H series strips all in parrallel , then i would need a 24v driver and the current would be split up between the 48 strips equally? 480w driver gives me 10 watts per strip.
if i do it the way i posted earlier , i will need a 48v driver.....again 480w gives me about 10 watts per strip.
is there any difference in running them in different ways ?
looks like im going to need 2 480 watt drivers to be able to run them at 20 watts per strip.....but if i do that i may need to build a heatsink.
im thinking if i only run them at 10 watts a strip i may be able to just tape/glue/screw them to about anythihng laying around for a frame....
but if i run 48 H series strips all in parrallel , then i would need a 24v driver and the current would be split up between the 48 strips equally? 480w driver gives me 10 watts per strip.
if i do it the way i posted earlier , i will need a 48v driver.....again 480w gives me about 10 watts per strip.
is there any difference in running them in different ways ?
looks like im going to need 2 480 watt drivers to be able to run them at 20 watts per strip.....but if i do that i may need to build a heatsink.
im thinking if i only run them at 10 watts a strip i may be able to just tape/glue/screw them to about anythihng laying around for a frame....
Barristan Whitebeard
Well-Known Member
The higher voltage arrangement should run a little more efficiently (higher voltage drivers are slightly more efficient than lower voltage drivers as well).
There will be less voltage drop in the circuit with a higher voltage arrangement. This would be more pronounced if you remote mount your driver(s) and used an inadequately sized wire gauge.
haze010
Well-Known Member
At 9 strips to 150 watts (16.6666 per strip) @700ma they only get warm with zero backing of any kind, ten would be taking things a little too far on the low scale i think. Right on the strip it says rated for 1.2amps at 24 volts, thats 28.8 watts. That high id want a heatsink, even at 20 you are likely ok without heatsink but just hook it up and see how hot it gets.
getogrow
Well-Known Member
Thanks haze. im probably going to run them around what you got. 16 watts sounds about perfect for efficiency.
why would there be less voltage drop on less voltage ? i thought voltage drop was [purely related to wire size/length ? Thanks
im learning slowly....
haze010
Well-Known Member
It's not a directly linear relationship and other things like temperature play a role as voltage drop is directly related to the resistance in a circuit. Think of it as like a percentage. If you lose 10% of 100 you lost 10, but if you lose 10% of 10 you only lost 1. So when you have less voltage the amount lost is lower
Grow Lights Australia
Well-Known Member
Voltage drop = Current x Resistance (simplified formula).
When you double the current across the same resistor, you double the voltage drop.
48V x 10A = 480W
24V x 20A = 480W
Same power but 24V has double the voltage drop of 48V across the same circuit (resistance) because it has twice the current. Constant current drivers normally output higher voltages and lower currents. Constant voltage drivers normally output lower voltages at higher currents.
So this explains why CC drivers can be more efficient than CV drivers on the same circuit. The main advantage to CV drivers is they are safer as their output voltages are lower. And in many countries you do not need specific safety ratings or certifiiction for low-voltage circuits, which can simplify things. Especially for DIY purposes.
haze010
Well-Known Member
Much better way of saying what I was trying to. I tend to use multiple smaller drivers tho, the largest I currently use is a 150watt.