I made the mistake of buying this light thinking I could achieve at least somewhat the same yields as I can with a 600W HPS light. The yield was about half, if that. More annoying is that the specs listed on Amazon's and MarsHydro's website say 387W, but when I received the light the instruction manual had several specs manually crossed out and hand written, such as the wattage which was written at 317W.



Another thing I learned is that if you have both the veg and flower switches on for flowering (recommended by Mars), having the veg switch on provides too much blue light, which keeps the plants from stretching. This is good if your grow space is confined height-wise, but otherwise you want some stretching as it develops and exposes more bud sights to the light. Having just the flower switch on cuts out the blue light, but isn't even close to enough power to develop massive buds. I also experienced a lot more leaves on the colas, which made trimming take much longer. And regardless of any of this, after studying spectrums a bit more, I discovered that calling LED lights in this price range "full spectrum" is bs, period. I was not impressed with the light penetration either.



All that said, the light did a decent job. The buds were very frosty and the terpene development was good. And of course you save on energy. But if you're serious grower who's looking not just for heat management and energy savings compared to an HPS, but massive yields as well, don't make the same mistake I did and buy "blurple" lights, shell out some more money for an actual full spectrum light such as the Electric Sky by Green Sunshine Company or the Spider series from Fluence. I went with the former and all I can say is wow!!!