You can use that light for vegging but the spectrum has already to much blue for flowering. But C. can adapt to a wide range of light so not optimal but they would still grow some weed. It would veg a 2x 2' area probably pretty well but for flowering you would need at least a 2nd one on a 2x2' area.
Can you still send it back to get something better?
Those lights cost probably ~79$ or so and for the price of two of them you can already get a true 140w Quantumboard v2 or the new ones with additional deep reds which are two times more efficient but have true 140w and can be used for veg and flowering. Its at least a 250w HPS equivalent cause you could pull up to 250g with such a board. They have a dimmer instead of a useless veg switch which only create an even more worse spectrum.
You would have twice as much light for the same costs and watts and you can expect to get up to 1,7g/w and more. With such blurples the best you'd get is 1-1,3g/w and thats only if you are a well skilled grower.
A beginner would end up getting 0,6-0,8g/w.
That's because even HPS bulbs are more efficient like these chinese generics.
Do yourself a favor and send it back or just use it for vegging. Most of us have tried them years ago and there are no changes made since then. They still sell the same outdated junk, with low end diodes, low end drivers and minimal heat sinks but load screaming fans.
A quantumboard works passively cooled and the new ones with extra deepred reach 2,6μMol/j efficiency. Such a blurple has maybe 1,3, 1,5 in the best case (calilightworx)and a new double ended HPS bulb reach already 1,9.
You want something with a white spectrum maybe supplemented with some deepred. Latest Samsung and Bridgelux strips are very efficient too but they are for diy'ers. QB's are literally plug and play and those blurples are light years behind!
For US peeps those companies are interesting ..
- horticulturelightinggroop (boards, strips, white and/or colored diodes)
- timber grow lights (COB based lights)
- pacificlightingconceps ( deepred supplenented strips and COB's)
And EU peeps should look at
- diyled.uk.com (white strips and COB's)
- led-tech.de (boards, strips and colored Osram strips)
Aussies should look at
- cutter.com.au (COB's, boards, strips, colored strips, they can make your dreams come true)
Some of them are advertizers here (cutter and HLG for sure) and you can contact the sellers directly. There are also some threads if you're curious to see some nice harvests.
Believe me, for a well skilled grower its difficult to not reach +1,5g/w with QB's or a COB based fixture.
