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I will go with 198g dry but i hope you get 10 Oz

This looks like a nice little build, I may have a go but with a better cob.

@stardustsailor, I know you like high power led's this looks interesting. http://www.izm.fraunhofer.de/en/abteilungen/system_integrationinterconnectiontechnologies/arbeitsgebiete/photonic-packaging/projects/cooled_developinglargeledmoduleswithextremelyhighpowerdensity.html

If anyone is really in to hard core diy!..then get one of these. and make most of your own stuff.

@OLD MOTHER SATIVA these may help you out. https://www.idealind.com/ideal-electrical/us/en/products/oem-lighting/1-chip-lok-led-holders/50-nichia.aspx

I would not mind trying to veg with 6500k with some UV NIR,

@robincnn These may be worth a look for custom optics. https://www.luxexcel.com/

I was just mouching round on the net and found this. http://www.colorkinetics.com/Learn/docs/PCK-Technology-Overview-IntelliHue.pdf It looks rather interesting how you can tune the output for different CCT. I welcome your thoughts.

To be fair, I was not looking at the lm/W I was looking more at the CCT and one vivid range has a CRI of 95

What about these http://www.led-cob.com/cob-led-f50 it may be rubish though.

HI BuckWheat, well as it is your first grow it is all a learning curve. 29 days sounds ok but not all plants will stretch 3 times the size in flower sativas will but indica you would be lucky if they stretch to 1 to 1.5 times just have fun and enjoy your grow.

This is rather interesting to @JorgeGonzales https://en.m.wikipedia.org/wiki/Luminous_efficacy#

This is the graph for a Philips 315w CDM942

Working it out you can run 6 on one HLG185@1050Ma

I am wondering what 10 of these screwed next to each other would be like http://www.digikey.co.uk/product-detail/en/samsung-semiconductor-inc/SI-B8U341560WW/1510-1132-ND/4935797

It does have some good info in it alesh

This is a good read, http://www.edn.com/design/led/4441872/What-you-don-t-know-about-LED-light-intensity-curves-for-grow-light-apps

Oh my god, all the bitching is so petty. Roll a spliff and relax

I'm sorry if this offends, but from what I remember from reading somewhere regarding adding CO2 to grow to do anygood for plants they had to be in sealed pressure controled room's and the amount of CO2 would be toxic

As to the condensation, that would depend on how hard you have to drive them to keep the temperature were you want it.But I do no think that it would be a problem.