VIPARSPECTRAKS5000 LED Grow Light, 500W with Samsung LM301H Diodes, Uniform PPFD, Dimmable Daisy Chain 6 Bars, Full Spectrum Commercial Grow Lamp for Indoor Plants, Suitable for 4x4/5x5 Grow Tent

Highly effective!This light is fantastic.My previous light came with my 3x3 tent (vivosun) which is the folding gimmicky light that has adjustable side panels that completely suck.This light is a solid choice for anyone using a 3x3 tent or a 5x5 (KS5000)Very bright, and I have no burn issues whatsoever.I like that the driver is detachable and can be stored outside of the tent which keeps the temps down.There’s a lot of nice lights out there and I put this light in the elite category.MarsHydro makes a nice light that is very similar, but this light just feels like quality and if you decide on one, you’ll see what I mean.

I waited a long time before purchasing an LED light for horticulture. I was only moderately interested in the technology before these bar type LED grow lights came out, and they were all just the panel type. Oh, the panel types are nice, and they do indeed have new algorithms to help make the PAR footprint more uniform, but they still don't measure up to these bar style light fixtures in terms of uniform light distribution. I know this, as I have run a panel type and a bar type side by side as an experiment. With the bar style, all plants grew straight up toward the fixture. With the panel type, some of the outer plants curved toward the center, where the light was more intense. No question about it.Also, Vipar Spectra has such a good reputation I felt totally confident in purchasing the light. I have used this light twice now, and it really delivers the quality results for both vegetative and flowering growth phases. And it is energy efficient!Super easy to install and hang and effortless to operate. By far the best light I have ever used. The health of all plants grown under this light is magnificent.The only complaint I have about this light is regarding the dimmer switch. Since LED lighting is so intense, the common practice is to include dimmer switches with the lights, so that one can start out in the seedling stage at 25% intensity, go to 50% after a few weeks, up to 75% later in the vegetative phase, and all the way to 100% at the initiation of flowering. With some other brands and models of LED grow lights a dimmer switch is included which allows the user to raise and lower the intensity in small increments (basically a rotary potentiometer which allows even1% incremental adjustments). That is not the case with this light. The dimmer on this light only moves in 25% increments, so the user can only turn up the intensity in 25 percent stages.This isn't a deal breaker at all, because for one thing, this is an extraordinarily well made and high quality light. However, it still would be a huge improvement to include a rotary dimmer which allows custom settings. This is especially important during the young phases of plant life. With other dimmers you can dial in exactly the amount of intensity, making it less stressful on the plants each time you turn up the intensity. For example, you could start out at 20% instead of 25% for germination/sprouting, and then go up to 25% for the seedling stage. Next, instead of having to go all the way up to 50%, you could turn it up to say 40% after a week and a half, then up to maybe 60 percent, etc. etc. Over the course of a month, you could use the better dimmer to much more gradually adapt the plants to more intense light. With only 25 percent increments, you cannot do this, but the light is still awesome and you just have to be a bit more careful with your distance from the plants and with when you turn it up each time. And by the way, I spoke with a Vipar Spectra rep about this. She told me that they include the more adjustable dimmer in future models! And that's actually another reason to consider Vipar Spectra. Their customer services if off the charts awesome! Truly!A GREAT LIGHT!

2 months in. Nice Even coverage, like the separate power block. well made. I hung the power block outside of the grow space and I think it really helps keep temps down. solid product.

This light is BRIGHT! Works great and has amazing value for the price. I have an XS2500 in my smaller tent and I love that too. Viparspectra is the best budget light by far.

the KS5000 is a dope light, Its built well, came perfect condition everything has been running smoothly right out the box. Out of all my lights this light stays the coolest, even compared to some 200 watt lights I have set up. It might not push the hardest compared to some higher priced lights, but it pushes hard enough unless you are supplementing with C02, that doesnt really matter. I will be buying another one. The only thing I cant speak on, is customer service. But hopefully if I ever need them, they will show up. This is a good purchase for your indoor garden. Will update a little further down the road with some more use.-updateSo I bought a second KS5000 and it works perfectly right out the box, 2 for 2 on this light. It's not the most powerful, its not the game changing tech. BUT its a solid light, ESPECIALLY if you don't use C02.ive never had to reach out to customer service so i cant speak on that, but if your thinking about this light and you're on the fence. Buy it, its cheaper than Mars and Spider and performs agruably the same if not better

The Viparspectra KS series is great. This is my second of them, I got the KS5000 when the first came out, and still going strong running every day. So far, the KS3000 light is working great, I tested the ePPFD, and it is spot on the new charts for the light produced with the 2024 model. Good job with a great light I hope, time will tell. I will tell you this the KS5000 has been going strong for two years without stopping. : Update it stopped working and the staff sent me a new driver during the busy holiday season and it only took 5 days from the start of the support email. Great support.

The light is good but beware, you cannot use with a aci controller to dim/set on a schedule. The light will only go down to 30% unless it is controlled with an outlet type controller which will actually cut power to it. Older models were not this way

Great light, has nice increments for light strength. I am growing the best tomatoes on the block with this light.