SZHLUX 400W LED Grow Light 4×4ft Coverage Dual Switch Full Spectrum Grow Lamp for Indoor Plants, Sunlight Plant Light 864 LEDs for Hydroponic Seedling Veg and Bloom Greenhouse

With 6 bars running approximately 33w each, this 200w light has been an excellent addition to my grow. I use it for seedlings and have the 600w version of their light I use for veg in my 4x4. I've never had an issue with the big light so I'm very happy to welcome in this smaller light to the family.One big advantage this light has for me as a seedling light is that it's not a dimmer system, it's a dual-switch setup. What's more, the first switch lights only the middle two bars and the second lights the remaining four. That guarantees me that at any point I can utilize this light at approximately 66,130 or 200 watts (I've rounded the numbers for simplicity's sake). Great for clones, seedlings or even cranked up to start into veg if you're needing a little extra time before you can move them. It's really a great light.One other point I wanted to make is that the customer service with this company is truly excellent. I had an issue with an item that was 100% entirely Amazon's fault and had nothing to do with anyone at SZHLUX, but they still took the time to communicate with me, pass on issues to the appropriate department and make certain that I was entirely satisfied with the experience. Nicole was amazing, friendly and quick to reply to any of my questions. In this day an age, truly good customer service is difficult to find and you sincerely cannot have a better one than I had with them. I very genuinely recommend putting your business into their hands, they won't let you down :)

If you're looking for watts/$ and reasonably high efficiency (advertised @ 2.7umol/J) these are definitely the way to go. I would not recommend using them for a 6x6 area, I run four in a 6' 7" x 6' 7" tent with CO2 so roughly a square meter per light and I've got no problems hitting the relatively high PAR levels I aim for. As long as they stay affordable I'll be coming back for more as I plan on sizing up to a 10' x 10' tent soon. The best use of these lights is to couple them with the single 70W bars sold by the same company. A single "4000W" (actually 400W) up top and a 70W on each corner for side lighting and I've had no trouble hitting 4 grams per watt in a square meter with my heavier yielding strains using RDWC.

When I first got it seemed to work fine but it did not even last a full year waste of money.My suggestion is if you order these you pay the extra 25 bucks for the 3 year warranty. I don't even know if that would help you. But in my opinion, these lights are junk.Amazon NS products have started Becoming a joke thinking about deleting my Amazon account. I spend too much money here to get this kind of b. S customer service.

turn on 1 switch 3 bars come on ,turn on switch 2 6 bars come on makes it so never have to move the light !light is massively bright compared to 400 mh or my other 405 watt to plug blurple led light that i used for years ! i believe as bright as my buddies 1000 super hps!i have a 300$ cob that cant even see beside this !time i plugged it up ordered another ! next is the 600 for my other room !i noticed after adding 2 of these in a 5x9 there is almost no shadows under my 5 foot babies :)light is light weight , runs at 108 degrees , raised to 6 feet above the floor and everything is taking off !this is by far the very best i have owned in the 12 1/2 years growing indoors ..will it last ? but for the price i can buy 3 of these lights for the price of 1 of the mark ups !!

I bought this light in June of 2021, it is now Nov of 2023. I'm just now going to replace the light due to the diodes starting to dim and produce less. But I've ran this non stop for 2 and a half years , so for the price I'd say I got my money worth forsure. Just ordered the new 5000. Can't wait to try it.