Between Spider Farmer, VivoSun, Mars Hydro, and AC Infinity who has the best LED lights for a 4x4 tent?
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I think most will say HLG or ACI Evo series. But those will be in the higher/top price range. However, there are some nice black friday deals going on.
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HLG hands down, ACI has really, REALLY stepped up tho the last couple of years. Mars Hydro and Spider Farmer are really pushing boundaries on output and cost, also. MH and SF have budget lines, but HLG has refurb that are like new. They are all brands, IMHO, that it is really more about your price point and what you want to spend.
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Spider Farmer or ACI from the ones you listed Growmie, advise that you choose either with the upgraded Samsung diodes 
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I stay away from mars, I had a budget light fail ( half the light) within a year of purchase. While they advertise a multi year warranty, it’s tiered. I was offered 20% off a new light.
Ac infinity- everything I have from them is top notch. I don’t have a light from them, as they are rather expensive, but trust their warranty and product quality.
I have read HLG is where it’s at, and they do have refurb units with only a year warranty at very competitive prices.
The spider farmer stuff seems good, but it’s in between mars and ac infinity in cost/quality. Personally I don’t think their lights are much better than mars so to me it’s just a more expensive option equivalent to mars in quality. A few shackles more gets you ac infinity.
Me personally if I can’t get the ac infinity unit cheaper when they drop their Black Friday deals tomorrow, I will go with the viparspectra 500w light. Though a bit under powered, for the price and quality it’s what I’ll go with.
I intend on staying with a 4x4 and a “ one and done” light that integrates well with my controller would be the ac infinity. Worst case I can use my current lights as side lighting with the 500W if needed but I’m really pushing for the ac infinity evo8. Hoping they have good sales, lol.
Just putting it out there, there is a code I found elsewhere for 25% off AC infinity stuff on their website. The code also works on Amazon, but for only 15% off. It says it will stack with the black Friday sale prices that start on the 27th on both amazon and their website. I emailed them also and they stated their black Friday sales do not start until the 27th, unrelated to what amazon says.
“TheStash15” is the code. I have checked it on both amazon and the website and it works as stated. I’m not sure if it will actually stack with their black Friday prices, but that’s what I am waiting on.