Hi guys 
Im using your HS1 version 1 from first days it has born and am very happy with it's light output and quality, which is the main thing i want from it. After some usage and Synjet failure (BTW thank for the fix, i am very glad that i paid money for good product with good support service) i have made some decisions and mechanical changes to my unit. I do understand, that warranty is far gone because of that, but i believe that LED module and driver are highest quality possible and not fail soon, especially after what i did. There is only one thing, which i want to talk about - it is cooling. So i will try to explain my thoughts clearly, so you could understand what i got to say.
I do understand, that Synjet is quality product and you have chosen them after many research. Also i do understand, that it's bug and failure was a simple wiring mistake. I have used it whole cycle with my plant and i after it's failure a have closed it's work more closely. Took top lid away completely (it was v1, without holes). Noticed, that radiator is constantly hot, noticed that Synjet is is always running at full capacity. I do not have IR thermometer, so i can not provide exact temperature of it, but it was way hotter than body temps and this gave me food for thoughts. I took a look to Lumiled tech data and info from various sources - Philips, DIY info i found on the net, etc. Found interesting moment - most efficient light output (for any LED, Lumiled also) is when LEDs are driven only in partial power. Less is load - more is PAR output. This applies also to temps, lest temps - higher PAR output, longer lifetime and much less heat. So, i decided to bring HS1 apart and put it's LED module on big radiator and cool it this way. Bought 190/150/50mm radiator and used it for cooling, used your original carbon cooling plate between module and radiator - this is another super good thing in HS1. Tried to run it completely without fan - it is still way colder than original HS1 radiator with Synjet, and it is logical, as new radiator is bigger 4 times. But afer that i have decided, that cooler for sure will be great, just for moving air thru radiator, to make it even cooler. I have used 20cm PC cooled on max 50% of its power and now my lights are just barely warm, like body temperature. Also now there is NO sound absolutely from my lights, large constant power cooler on slow RPMs eliminated noise completely and gave super good cooling.
So, here is all this info in one conclusion and maybe even offer to you to think about. How about design of new lights, which would be based on same quality LED module, driver and optics, but instead of small radiator and Synjet, it would have huge radiator, which would be used not in nearly full capacity, but in fraction of it, like 20-30%, and totally noiseless huge 20 cm fans, which would run for a very long time too, but make things even cooler. You could use your pro skills to build such a unit, it would also be compact (same size as HS1, if it would be with same 75W module), and for the same cost of Synjets (i have found these also). Then you would offer growers really high end (i say so, because high end always uses huge radiators
) lights, which would work virtually forever. They would change LED module in few years and that's it. This would bring you loyal clients and i am sure, truly legendary name in this business. I even would participate in such item designing with great pleasure just for fun. Surely, such apparatus would be heavier, but thing is, all high - end is heavy, that is the way it is I think this really would not me a problem.
You see, i am familiar with electronics for more than 25 years already, have build acoustic amps and scene equipment, many years worked with pro lighting equipment and know something about things like these. Please do not take my thoughts as any kind of insult or spamming, just wanted to share my thoughts and maybe, only maybe help you decide some changes in your future models.
Thanks again for great work you have done as small company. This is really big work to organize and make highest quality equipment. And i cannot imagine, what were the investments to all this. GN rules
Im using your HS1 version 1 from first days it has born and am very happy with it's light output and quality, which is the main thing i want from it. After some usage and Synjet failure (BTW thank for the fix, i am very glad that i paid money for good product with good support service) i have made some decisions and mechanical changes to my unit. I do understand, that warranty is far gone because of that, but i believe that LED module and driver are highest quality possible and not fail soon, especially after what i did. There is only one thing, which i want to talk about - it is cooling. So i will try to explain my thoughts clearly, so you could understand what i got to say.I do understand, that Synjet is quality product and you have chosen them after many research. Also i do understand, that it's bug and failure was a simple wiring mistake. I have used it whole cycle with my plant and i after it's failure a have closed it's work more closely. Took top lid away completely (it was v1, without holes). Noticed, that radiator is constantly hot, noticed that Synjet is is always running at full capacity. I do not have IR thermometer, so i can not provide exact temperature of it, but it was way hotter than body temps and this gave me food for thoughts. I took a look to Lumiled tech data and info from various sources - Philips, DIY info i found on the net, etc. Found interesting moment - most efficient light output (for any LED, Lumiled also) is when LEDs are driven only in partial power. Less is load - more is PAR output. This applies also to temps, lest temps - higher PAR output, longer lifetime and much less heat. So, i decided to bring HS1 apart and put it's LED module on big radiator and cool it this way. Bought 190/150/50mm radiator and used it for cooling, used your original carbon cooling plate between module and radiator - this is another super good thing in HS1. Tried to run it completely without fan - it is still way colder than original HS1 radiator with Synjet, and it is logical, as new radiator is bigger 4 times. But afer that i have decided, that cooler for sure will be great, just for moving air thru radiator, to make it even cooler. I have used 20cm PC cooled on max 50% of its power and now my lights are just barely warm, like body temperature. Also now there is NO sound absolutely from my lights, large constant power cooler on slow RPMs eliminated noise completely and gave super good cooling.
So, here is all this info in one conclusion and maybe even offer to you to think about. How about design of new lights, which would be based on same quality LED module, driver and optics, but instead of small radiator and Synjet, it would have huge radiator, which would be used not in nearly full capacity, but in fraction of it, like 20-30%, and totally noiseless huge 20 cm fans, which would run for a very long time too, but make things even cooler. You could use your pro skills to build such a unit, it would also be compact (same size as HS1, if it would be with same 75W module), and for the same cost of Synjets (i have found these also). Then you would offer growers really high end (i say so, because high end always uses huge radiators
) lights, which would work virtually forever. They would change LED module in few years and that's it. This would bring you loyal clients and i am sure, truly legendary name in this business. I even would participate in such item designing with great pleasure just for fun. Surely, such apparatus would be heavier, but thing is, all high - end is heavy, that is the way it is I think this really would not me a problem.You see, i am familiar with electronics for more than 25 years already, have build acoustic amps and scene equipment, many years worked with pro lighting equipment and know something about things like these. Please do not take my thoughts as any kind of insult or spamming, just wanted to share my thoughts and maybe, only maybe help you decide some changes in your future models.
Thanks again for great work you have done as small company. This is really big work to organize and make highest quality equipment. And i cannot imagine, what were the investments to all this. GN rules
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