Also to point out..
The spec sheet of the
Viparspectra says lifetime 100,000 hours which is completely incorrect for their quoted "bridgelux and epiled" Chips. Most Cree SMD's only hit around 60k hours before they lose 20% of their output.
The only LED chips that I have seen have a LM95 (lose 5% of light by X hours) is Osram with a LM95 of 100,000 hours... Which are probably 6-10x more per chip than "epiled" which is equivalent for cheap generic LED chips.
I briefly looked to find the Lumen Maintenance data on the Bridgelux and a quick search did not give the full LM80 rating, however did show that within 6000hours of use, the bridgelux chips lost between 5-10% output.. in 6000 hours..
Just thought this was another "false" fact that these crap LED companies are lying about.
Also, their recommended coverage area must be fore growing wheat grass, because when you look at the par numbers, the very middle 1x1 square is hardly enough light to correctly illuminate flowering cannabis, let alone a 3x3 area.
To note.. the reason why brands like this are popular is they are sold on Am@zon.. and Am@zon has an affiliate program where you can earn money on goods that people purchase. If you go to "Goo#le and type in "top 10 LED grow lights" just about every single page that pulls up in the results, will be pushing brands like Viperspectra, and the almost certain way to know if they are making affiliate money, is 9 times out of 10 they will do a quick product review, show a photo, and then have a link, which brings you to the Am@zon page.
Keep this in mind if you ever are looking for product reviews online... if a page pulls up and links out to a Azon sellers page... chances are they are an affiliate trying to earn a commission.