you are fine, welcome to my thread and this forum! And thanks for watching and supporting me, Robin & GG.
-I love micro grows! and I love helping people spec them out because a little money can go a long way in creating a DIY build that can offer you some control & adjustability.
-grow space: 17" x 17" ( 0.186 m2)
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@Airwalker16 nailed it 30w per square foot with dimming capability would be great for the space.
60w with a blend of spectra is going to be easier to achieve with some discrete diodes than COBs. I would probably mimic the spectrum that greengene has linked in various places:
View attachment 3717878
if you listen back to our tech talk yesterday, GG describes which diodes offer the best performance in each color class.
A meanwell LRS DC power supply and some Meanwell LDD dc-dc drivers will offer you an affordable and controlable way to drive them, assuming you dont mind investing $40 on a pwm controller.
Alternatively: a single cob build would work as well. a 72v cree cxb3590 3500k run at 700-800ma in series connection with:
(1) 450nm mono
(1) 620-630nm mono
(2) 660nm monos
would allow you to have a simple build on one driver.
If you use the pressure sensitive graphite TIM & the solderless top bin stars from Cutter Electronics, you could put this together in an hour+
* how many volts would you need for the driver...72 + 3 + 2.5 + 2.5 + 2.5= 82.5v @ 7-800ma should get it done.