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it depends on current and sometimes you loose

Vero18 Gen7 against the Citizen 1212...

designing a passive System means there is no airflow, than that created by the heat sink . and a significant increase in lifetime with a bit airflow is no longer a passive System.. "i am just too deep in this shit"

Passive... ...next time

carefully reading datasheets helps alot

working closely with ledil and using the word "refractance" tells me a lot. in optics we use the words "Refraction / refractive index"

Yes, and make sure you have a metallic contact. check for paint / anodized surface. classic connection parts for this job

things i don´t believe

... Pacific Light Concepts PARSource Philips GreenPower Plant Photonics...http://plantphotonics.com/ PhytoLux Platinum LED Pro MAX Grow ... fixed...

V8

the voltage over a cob holder can never exceed the voltage of the cob inside the holder. except there is no cob in the holder. and if this happens to you you should better stop smoking.

2x200kohm dimmers - 4 drivers... You should better Buy a HID

like this?

and don´t forget to buy some this f(r)osters https://www.led-tech.de/en/High-Power-LEDs-Seoul/SSC-VIOSYS/SSC-VIOSYS-UV-CUN66A1B-on-Star-PCB-LT-2575_121_240.html

no rectifer , done by the cobs itself

vero18 old version.. the LES Aera is nearly the same... 18mm for the vero, 22mm for the citizen. the greater LES of the citizen does not help here... and Cree is not way behind this numbers from Brdgelux. at this time there is no Cob that beats Cree or Brigdelux in this field....

nice story...any way to back up this, with numbers...

samsung as as all reputable Led Manufactors use nearly the same phosphors-mix. so if one of them can grow a plant...