Another cut and paste from that internet thing. Not for everyone but LED grow spectrum bulbs-strips-diy parts etc. are getting very cheap on ailexpress

https://www.lumigrow.com/applied-researches/led-growers-guide-vine-crops/

 

Although I suspect the information MAY be worth the effort, I gave up after clicking the download button and facing a form to enter my contact information which may be sold on to God only knows who.  And the anticipation that it may be followed by yet another page (or more) asking for more of my time and information.  I'm on enough junk email lists, and too much info is available online without jumping through hoops for something that usually turns out to be a de-facto product brochure rather than impartial data.  

 

(Just in case anyone with Lumigrow is tuned in- it's a crappy, worn out ploy)
 

Still, I appreciate Hereinthailand's link.

Well nothing is free especially on the net these days. By the way how did you sign up for thaivisa ?

I believe the top of the google search is what you want without the strings.

 

You might like this if your into colors.:    www.youtube.com:watch?v=hSVzhrCVBqw.webloc

 

DIY cob's from Bridgelux, Viro 29's, 35k and  50k. Last pic is 40-thieves supplier with a simi

DIY light.

rice555