Newbie need advice on amazon light using cxb3590`s

So i know how the community feels about chinese leds on amazon, alibaba ect
I dont have the time to diy a light and was about to pull the trigger on a led from timber grow lights, but came across this one.

Product:

https://www.amazon.com/CF-Grow-380nm-780nm-Hydroponics-Greenhouse/dp/B06XPX281Y/ref=sr_1_6?ie=UTF8&qid=1495752554&sr=8-6&keywords=CF+Grow

Light presentation:


power testing;


The presentation is comical and i cant seem to find any advanced testings, but they are cheap ready-made cxb3590 lights. Buying these would cut the total costs by 40% for me, plus give me the opportunity to pay with bitcoins, which most led light stores don`t offer.
I am not yet schooled in driver efficiencies, ppfd and microjules and all these things so i am asking you guys.
Any thoughts on the quality of these?

looks like they are running those crees at 100W

thats pretty hard and not all that efficient

This is probably a stupid question, but if you use the built-in dimmer and put them at 50%, would that fix the efficiency and life span?

no issue on the lifespan either way but you will have way overpaid for 100W worth of light

I had one and finally resold it on internet - inside 4 CREE3590 on a hlg 320h 36B... too much useless watts... I used it at 50%... not the same space between the COB. Here is a pic of inside the light:

It says actual power 300W I assume they run them at 1.7a?

You can get 250W CXB3590 framework for exact same money from Dan, why would you even bother with these?

http://timbergrowlights.com/250-watt-cree-cxb3590-square-framework/

PilouPilou said:

I had one and finally resold it on internet - inside 4 CREE3590 on a hlg 320h 36B... too much useless watts... I used it at 50%... not the same space between the COB. Here is a pic of inside the light:

Click to expand...

Have you disassemble it to confirm that these are indeed cxb3590? When I see lights online being sold in these type of enclosures it usually ring the bell in my head...

Sanitas Vibrationum said:

Have you disassemble it to confirm that these are indeed cxb3590? When I see lights online being sold in these type of enclosures it usually ring the bell in my head...

Click to expand...

Yes it was with ideal holder - I grown one session with very good results on a 18x18 area at around 50/60% power. It was my first CREE light but overpriced for only 18x18. Unfortunately I didn't know DIY when I bought it!