JorgeGonzales
Well-Known Member
To be extra super duper clear, here is the 1818 @robincnn tested, with data according to Citizen, and my own digitized SPD charts for the efficiency numbers:
Personally, I run at 700ma on mine, but according to robin's data in this post https://www.rollitup.org/t/top-bin-cob-comparison-2.897765/page-5#post-12726618
And his chart here:
The 1818 is testing well above a 3590 CD, which means all those Citizen numbers are complete bunko, or conservative, to put it more politely. If these practical measurements are in the ballpark, at 700ma I'm somewhere north of 60% effficieny at 35W?
So yeah.
And remember, all of this is indirectly measuring what we really want, which is straight up photon flux measurements. But until somebody buys a sphere or joins from a university with one, we have to approach things from oblique angles. We are lucky to get any useful data at all from cob to cob comparisons like people try to do here. It's tricky as hell.
Personally, I run at 700ma on mine, but according to robin's data in this post https://www.rollitup.org/t/top-bin-cob-comparison-2.897765/page-5#post-12726618
And his chart here:
The 1818 is testing well above a 3590 CD, which means all those Citizen numbers are complete bunko, or conservative, to put it more politely. If these practical measurements are in the ballpark, at 700ma I'm somewhere north of 60% effficieny at 35W?
So yeah.
For the same reason Supra normalized his data to 50C. You need to control for variables, and they are two separate things, so pick one and keep it static. The current droop curve applies equally at all temperatures, as far as I know. More current equals higher temperatures, but so does inadequate cooling, a hotter room, etc. One variable at a time.If you want to use current droop data, why wouldn't you want to use temperature droop data as well, for the same reason?
And remember, all of this is indirectly measuring what we really want, which is straight up photon flux measurements. But until somebody buys a sphere or joins from a university with one, we have to approach things from oblique angles. We are lucky to get any useful data at all from cob to cob comparisons like people try to do here. It's tricky as hell.
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