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i am using the cxa2530 as a veg light at 450mA its 50% eff so no complaints

they told me they only had the cxb3070 AD bin for 31 bucks cutter is the cheapest place to get the CXB 3070BB right now(32$) with PLC 2nd($36ish from memory)

well its actually alot less watts and less efiicient than a 600W HPS so if you absoultely wanna be cheap best you just run cobs harder/ get more lower bins i suggest 11) 2530s ( http://www.newark.com/cree/cxa2530-0000-000n00s40e7/led-hb-white-3372lm-screw/dp/44W6079) $69 and run them at...

do u even know where china is on a map? seriously though, how does that qualify cobs sold in china being binned correctly? Nike is also made in china, are you suggesting I cant find fake or mislabeled nike shoes in china

absolutely not a science-even so many variables( a tiny breeze in one of the tests, i micro mm of dif between sensor distance, dif thickness of tim, dif smoothness of sink etc etc etc) but even so we can call approximate field testing the data could be very dif than the data sheets and perhaps...

this is the test we are all waiting for as i remember you order from arrow not KB right?

thats cool what r u using to get those spectrum graphs? id love to play around a bit

all ur doing is paying to have worse cooling just wire properly and use tip ties

hi im trying to find the post with all the hot links but cant-help? also what r ur thoughts on using a pc power cord for ac connection then running all drivers/fan drivers in parralel off that single connection? thanks

not that it matters but at 1 point you say .7mA whne you write and mean .7A if u still want to add annotations

http://shop.stevesleds.com/Aluminum-Heatsink-tubing-T6063-1-1-4-8794102413.htm?productId=24 http://shop.stevesleds.com/Pressurizing-Cooling-Fan-with-Power-Regulator-8794102414.htm

8

https://www.fasttech.com/products/3587000

yeah fully did everyone miss the xl file I uploaded to calculate this or is it not working?

are dc boost drivers way less efficent or smth? why dont we see more of them being used

so if ive understood the graph @ aroung 50w the cxb3070 is pretty much as good as the 3590

so this is for all par sensors not just this usb sensor kit? if any one knows the SPD of the cobs it would be you, so I assume we have no practical way of measuring light output from these DIY COB builds?

im super interested to hear you elaborate on that I was looking on the reef forums where guys were hacking a lux meter by adding filter lenses/better diode etc i thought this could be a viable option are you referring to the soft ware not being compatable with the leds?

gifts from teh ganja gods

i uploaded the xl sheet also on the far right i included calculations for ppfd u just put in ur total watts efficiency and size of grow space