Works really well. Lightweight. Generally a decent option for indoor gardening, seed starting, etc.

I'm using this light to start normal garden variety plants, the tomatoes and peppers are showing increased growth in just one day (14hrs) of use.

From germination to flowering, the spectrum adjustment nails every phase. Worth every penny for serious growers.

First of all I just want to say that I purchased an SPF 2000 about a year ago. Figured I'd give it a shot, great price very affordable. I haven't had a single issue with it, works great and the pppf meter on my phone says it operates at about 600 to 700 at around 12 in.
Flash Forward a year and I have two lights burn out. Old blurples I bought used LOL
So I got to look in a little bigger and really got time to read the reviews. I've never had an issue, but apparently those who have said the customer service is excellent. Pretty much overall reviews are great. So went ahead and got the SPF 4000. It just arrived today and my phone is reading right around 1050 pppf at 12 in. I am a complete amateur and so I don't know how to use any of the other meters. But I'm going to presume that this light is going to be every bit as quality as my 2000.

I live in a very cold climate and grow a lot of plants indoors year round and I was excited to get these to supplement my current lights and hopefully encourage my plants to flower and fruit better since they can't be outside at the time they are all ripening. It will be a test that I won't have the results for until the end of the year but I have high hopes. The lights themselves are very good quality, amply bright and nicely sized. Pricing is good and I'm happy with what I received.

I liked how easy it was to assemble! Literally two to three steps to connect the three support tubes together and then connect it to the base. Light is very very bright! I sure hope it will help my English Ivys grow new leaves! After bringing the ivy in around the end of summer/beginning of fall, it's not getting nearly as much light as it once received outside. As a result, many of the leaves start to turn yellow and fall off. Although my windows face south, not enough light reach them for a long period of time. The grow lights do indeed give off a chemical like smell that fills the air when they first heat up. Thankfully, this only occurs once/twice during the initial power-up, and then only barely noticeable the second time the light is turned on. To give you an idea... it smells like some kind of fertilizer... Almost like horse or cow poop in a barn. As mentioned, it does go away after the first or second use... just a very odd gas/chemical like smell.

I will update this review on the effectiveness of this grow light after a few weeks of use! 🙂