Yep. Between 700ma(~25w) and 1000ma(~36w) will get you 170lm/w+. Depending how you cool them...1400ma can do it. Assuming the newer DB bins.Hi,
Cree's website states that the maximum efficacy for the 3590 is 174lm/w . Can someone tell me which MA this is at?
I'm looking at the "relative luminous flux" charts and calculating my lm/w based on that data but i'm wondering how are doing it?
Thanks!
Those measurements I posted are from a CD...not DB, so they are not lining up. But when you see it in the PCT you can side by side them. It would be a factor of 4.2 to be inline for DB...specially considering active cooling.just for fun when i multiply my recent ppfd sphere measurements by 3.8 for CXB DB on two different days (diff temps). seems to fall along same lines
my 2.4A measurement was a little higher than yours as it was aggressive active cooling and measurement taken before steady state
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so if that has basis it seems cobs can get to 180 lm/W at 10-15W and top 190 at 5W - but it seems we are at the practical limit there
@Greengenes707 do you think PWM would help those low current measurements push 200?
i actually realized that and went back and redid that post before i saw your response. isnt 4.2 a 10% bump? thats a bit more than i would anticipate from a chip spec upgrading from (presumably the higher range of) CD to (presumably the lower range of) DB. as midpoint bin to bin is like 7%. they do tout the recent 10% bump in efficacy but then we would expect every model to jump 1 bin minimum and 2 in some cases, no?Those measurements I posted are from a CD...not DB, so they are not lining up. But when you see it in the PCT you can side by side them. It would be a factor of 4.2 to be inline for DB...specially considering active cooling.
so on a standard dc voltage measurement between controller and diode is the the PWM invisible? and if so, how do you quantify overall input power?I use a storm controller and dim via PWM for all my testing. And then measure current and voltage while it going.
i actually realized that and went back and redid that post before i saw your response. isnt 4.2 a 10% bump? thats a bit more than i would anticipate from a chip spec upgrading from (presumably the higher range of) CD to (presumably the lower range of) DB. as midpoint bin to bin is like 7%. they do tout the recent 10% bump in efficacy but then we would expect every model to jump 1 bin minimum and 2 in some cases, no?
so on a standard dc voltage measurement between controller and diode is the the PWM invisible? and if so, how do you quantify overall input power?