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jubiare

jubiare

Active Member
:The heatsink deals with 130, if they are 130, at least that's how you calculate it.

But this rhino isn't repetitively said to draw 170ish:o

I don't even care much, actually I do a bit coz of the made in USA and employment of osrams!

David, you might want to ask the people at rhinos, tell them hey, they are bitching about the light on forums.. Sorry about that, but I am curious about the passive cooling approach:peace:
 
jubiare

jubiare

Active Member
I mean everything else looks good from those rhinos, look at the diodes spaced apart compared to commercial approach. That def saves on the diode's lifespan, especially since driven all at 700.

This must have to do with the solaro sun storm, if you guys remember that light
 
PSUAGRO.

PSUAGRO.

Well-Known Member
^^^^^that's what I meant jubiare that it's 170 watts at the PLUG including the driver!!!!.....so 130watts of leds is definitely within the cooling ability of that heatsink, $ per watt is very high on this panel.

my driver consumes 8-9watts to power 56watts of leds........to me the driver on the rhinogrow seems inefficient or am I wrong here guys???
 
guod

guod

Well-Known Member
:The heatsink deals with 130, if they are 130, at least that's how you calculate it.
Click to expand...
that show the Heatsink has to deal with about 100W..

But this rhino isn't repetitively said to draw 170ish
Click to expand...
to drive this amount of OSLON at 170W you need more 1000mA per LED
 
jubiare

jubiare

Active Member
Well it cannot be that inefficient just burning watts like that.. So it cannot be 170 at plug?

Also, 2400 square inches of heatsink would cool 130watts, giving a 18.5 square inches for every watt burned...

Does it look to you it has much heatsink? Are there fins in the design?
 
guod

guod

Well-Known Member
most power-supply have an efficiency of 85%
172W x .85= 146W
10% Headroom is also a golden rule in this field
146% x .9 = 131W
from my view the rhino-Panel are well conceive


Does it look to you it has much heatsink? Are there fins in the design?
Click to expand...
aera is only one part of a heatsink
other factors are:
thermal path/thermal tranfer
thermal resistance

if there was only aera thats count, i would use alu foil
 
jubiare

jubiare

Active Member
Dissipating area is a very tangible and concrete way of looking at it, the variables concerning quality of heatsink are minimum, I learned that from knna and aquarium forums. The thermal path is something else and we are just assuming it's a good one.

So stop the fanta scientific..

Edit: but you are right about the power supply, I apologise... It's a power supply not a driver! I better understand your calculations and what psuagro said about the driver supply.

I also looked at pics of the design, it has fins.

But still, it's better a light that lasts you 80.000 than one that lasts you some less; ideally you want a array that runs barely warm to the touch, not quite hot.. But it seems like rhino falls within a "safeish" zone, only way to know for sure is measuring the heatsink area.
 
jubiare

jubiare

Active Member
You are basically saying that my mevos burning 160w of LEDs are going to be some 220w at the plug because of bloody drivers? That's bollocks. Give me a break

Edit: no, you are not saying that.. Coz rhino utilises a power supply so the story changes slightly, I apologise
 
jubiare

jubiare

Active Member
The point here should be: lifespan of LEDs is not a joke and active cooling or passive cooling, things have to be taken care of properly... And often they are not. I am not sure about the rhino, I really hope all is good with that.

The point is, how many times has happened to people, not talking about grow lights only, people being disappointed of lifespan of LEDs? The 80.000 hours expectancy becoming only 15% of it?

It's all because of heat management that is not looked at properly.

It would suck big time having a light that after only one-two years goes to" wtf" is it dimmable now? :D
 
C

ClosetChronic420

Member
posted a couple pics of my two plants under my B.S. 240 a couple weeks ago. one of them turned out to be a male so there is only one plant under the light right now. unfortunately I used MG soil for this one, but picked up some FoxFarm Oceanforest for my next grow, which I got a couple more seeds about to sprout.
20130113_124548.jpg20130113_124609.jpg
 
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David the Gnome

Member
Look guys, the lights do what they say. Im not going to try and touch on all that was asked, cause i dont know. Between my grows and my job i have alot going on. Thats what you guys are fo,r digging deeper. The real q is are these lights worth the money. I think so...but the only way to know for sure is to test it against one of the cheaply made ones and see the out come. Anyone want to do a test?
 
jubiare

jubiare

Active Member
Emailed rhino yesterday, David. I'll see if they are keen to answer a few questions.

I have no doubts your panel would win against pretty much any commercial panel! (Same leds wattage)
Have you got any finished grow, more pics Etc..?
 
S

sophie9000

Member
Purchased from HGS, 50w led tri band 12x12. Using first time on 4 Hash Plants, using dirt, peat, all new and clean . In second week I noticed maybe the light was putting more heat than I thought, lights about 4 inches from top of plant. Seeing a bit of curl starting, and the color of the plant is more blue than the others, raised the lamp 2 inches but now it looks like it wants to stretch. No nutes at this time. Only one plant was affected, the others don't seem to be having any adverse affect. Possible plant defect, good seed from European growers have used before. I will take a pic when the lights go out.
 
D

David the Gnome

Member
Ya i would keep the lights at least 6inch from plants. I suggest 8-12". 16" would be the max but i know people who have their leds 16" and have no problem in veg...
 
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EuphoricMojito

Member
This thread was excellent to go through. A friend of mine is currently putting together research for their first grow, and they are def wanting to use LED. Like the poster a few pages back, they were also considering a Pro Grow LED. They have now decided to either go with a Area 51, or splurge and go with the California Light Works (other suggestions welcome). Not sure which light to go with from either company for their situation.
Grow area will be 5x5 with 6ft height .
How much light is too much for a 5x5 grow area?? They want GOOD lighting. They want their initial investment to last them awhile, and produce nice fruit and yield. So they are willing to spend extra to get that, but would also like to go with the highest quality coupled with cost effectiveness (no need to pay more than necessary right?) They'd also like to minimize the number of lights needed, so if there is a single panel that would do a area that large on its own - that would be great to know. Ideally the light could carry them from starting veg through to bloom as well. Is this asking for too much? lol Does a light like this exist that can perform on it's own in that size of a grow area?
So happy for this thread. Thanks for all the great info from everyone who has already contributed and thank you in advance for any recommendations. :peace:
 
Green Dave

Green Dave

Well-Known Member
EuphoricMojito said:
This thread was excellent to go through. A friend of mine is currently putting together research for their first grow, and they are def wanting to use LED. Like the poster a few pages back, they were also considering a Pro Grow LED. They have now decided to either go with a Area 51, or splurge and go with the California Light Works (other suggestions welcome). Not sure which light to go with from either company for their situation.
Grow area will be 5x5 with 6ft height .
How much light is too much for a 5x5 grow area?? They want GOOD lighting. They want their initial investment to last them awhile, and produce nice fruit and yield. So they are willing to spend extra to get that, but would also like to go with the highest quality coupled with cost effectiveness (no need to pay more than necessary right?) They'd also like to minimize the number of lights needed, so if there is a single panel that would do a area that large on its own - that would be great to know. Ideally the light could carry them from starting veg through to bloom as well. Is this asking for too much? lol Does a light like this exist that can perform on it's own in that size of a grow area?
So happy for this thread. Thanks for all the great info from everyone who has already contributed and thank you in advance for any recommendations. :peace:
Click to expand...



Have a look at the Black Dog
All 5 watt
im running them now and wow.
have a Procyon and its ok but the black Dog is by far the shit.
Customer service is Great
Good Luck
 
C

ClosetChronic420

Member
Unfortunately when I was buying LED's I didn't have enough money to get a real nice LED. So i bought the B.S. 240, it is a good light for the area I am working with, just wish they had a better warranty. If I had the extra money I would have gone with the Black Dog or Area 51.
 
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