Chinese cheap Driverless cob grow test

actually. it has a small driver on the board. but we call driverless cob.

i have about 20 of driverless cob chips.

50watt set is about 4$. (2$ chips +2$ cpucooler)

the lux test is about :

driverless-cob 3000K

30cm=10000LUX
20CM=14000LUX
40CM=800LUX


these cob chips is about 90-100lm/w . but i don't know the par value
so i don't know the result of the yield.

i have hps 250-400W. i will test the lux later and maybe make a control test

cxb or QB or citizen they have higher lm/w maybe 130-150-180

but i still don't know the par. even i know the par didn't mean i can tell which chips is better without a

really grow test.

Is anyone had do this growth?

i find lots people use these driverless chips without

Announced there yield.

i almost search all these aritcle about driverless cob grow ..

but actually..there is no result.. they didn't do a "" Experimental Group vs. Control Group""

maybe it's suck only 0.5gpw

or maybe it can get 0.8gpw.. or maybe some master can get more than 1gpw..?


have anyone used driverless cob?

plz let me know.

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i would bet the lightbulbs at the big box stores are at least as good

There is a guy on RIU using those with decent results. He's in a part of the world where electricity is very cheap, so efficiency just isn't an issue. To my surprise, he has had good reliability.

"New The is a guy on RIU using those with decent results"

can you tell me who is this guy? and link?

Sorry, I can't find it. The RIU search engine is not working for me the last few days.

Edit: I found it. Post #28.
https://www.rollitup.org/t/ic-driven-cob-leds-experiences-advise.941725/page-2#post-14010875

search engine is not working for me too.. hey!

Post #28. only said he grow for a year. but didn't make a Comparing with hps or expensive cob

so. the cheap cob grown result is still unkown,

really thanks for your helping!!