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the use a phosphor from years ago for the warmwhite way off the black body locus into the yellow range a trick to make the Light look warmer than it is the LER of 396 lm/W makes this Cob not very efficient

a 120 degree lens on 120 degree Cob makes sense...

and now take a deep look at your ppfd- calculation.... distance matter as beam-angle..

meant for cobs, for single dies at 10 watt forget it....good for 3 Watts monos on Star-MCPCB 3M™ tape 8805 -> Thermal Conductivity‎ 0.60 W/m-K‎ one of the best grease -> Thermal Conductivity‎ 8.5 W/m-K‎

my piont of vuck

you are right, edit my above post Q.: what happend if you disconnect the base. - normally the Led turns off. Q.: what happend if you connected the base (resistor is needed) to 5V - normally the led turns on. if both cases are true in your build then there is a problem with the Arduino...

change collector and emitter for the bc547 change the Pic for the bc547

COB-KILLER... 3M™ Double Coated Tissue Tape 9448A Good high temperature holding power Nameplate bonding, plastic film lamination/bonding, splicing, and foam bonding Adhering, joining, affixing, bonding, mounting, holding, laminating, and attaching...

uniformity is the key... where less light, there is less growth

me came from Nokia-Land also know as Angry-Birds-Country spain is to hot for me...

and for the rest... i have to talk with a good old friend of mine.. .

ups... ; new order code had this in mind LH CP7P

don´t know what´s wrong... GH CSSPM1.24 SSL 120 is the FAR RED from Osram -> 730nm but website says 660nm hyperred

nice idea , especially the ones with the pulse function

die formel für leistung ist P= U x I an 1 Ohm Widerstand sind die Werte für Spannung und Strom gleich. - Formel I= U/R und U= I x R was messen wir ist die Spannung über widerstandsnetzwerk -> 10 x 10Ohm parallel = 1 Ohm - 10 x 0,6W =6 Watt daraus folgt wenn wir die gemessene Spannung...

puede ser mucho si usted sabe cómo usarlo FastStone Image Viewer 5.7 http://www.faststone.org/

real world test... https://www.rollitup.org/t/spectral-lightmeter-gigahertz-optik-msc15.913239/page-7#post-12781518

with polar patterns you think in circles...

workstation...photoshop... high res. monitor

1% from the Picture