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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...

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

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...

OK so David, your panel doesn't draw what you have been told, for a start:o

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?

Hey psycho, what's your media, maybe you have already mentioned it sorry

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

: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...

Psua, it doesn't really work like that. The driver is never gonna add any watts like a ballast, Dependent upon its efficiency yes it's going to burn some extra watts . it can radiate heat especially when driven by the Max amount of LEDs! . The heatsink has to deal with 170w, regardless the...

You prob want to literally count all the heatsink area you have on the unit, both sides and all the fins... But maybe you are just concerned about your results in your garden which is fair enough! But if you count them you'll know more about the whole thing;)

You maybe want to tell the people at rhino that they "must" (if they care its a must) provide more heatsink for that 170w .. It's not a claim I am making, it's tech from datasheets and the whole led characteristics. I am afraid you are very naïve in being at peace of mind when the 80,000...

169 square inches for 172w draw? mmmm you haven't counted the fins? I am sure it's more total dissipating area for the 172w (?) All the companies put fans in them because they'd rather actively cool than spending the money on massive heatsinks! I don't like fans either, but It looks like the...

how is that all gone:o:o:o:o Alex, RIU is like that... most people lurking ... than there is preferences and things ... :shock:

ahahahahahahah!!! I kind of feel that by the time your last plant is down ... the one you are smoking will be gone already :D

you have gone very blue there .. you'll kind of put them in a "dormant" state .. let's see. nice with the diy anyway!

the concept is simple, let's take 1.3 watts of a red chip .... all of that that is not efficiency is translated in heat. So more efficient (latest gen) translates in less heat! In general you can have quite different stories with same watts panels, some are more heat than photons and vice versa!

YES, because in a few years diodes efficiency has improved, and if efficiency is higher heat is less .... I have kind of gone to say 19 square inches can be safe as it was 21. But for the latest diodes like cree xte you need even less heatsink apparentely! Supra has done some calculations on it

total surface area of the entire heatsink, fins and all sides

19-21 square inches for every watt burned! (even slightly less with latest generation efficiency ones ... generating less heat, they'd need less dissipating area! for those kind of equations supra is the guy who can help)

good point on the spectrum in my view, but you'd still want to look at those whites ... some whites have that IR you are talking about, some others havent nearly half of what you think! Even Cree, some have more IR some very little, well at least from their datasheets ... for how accurate they...