Way over priced comparetively speaking over hlg even which again are way over priced but even hlg is decent enough to spit on it before they jam it in, this light isnt worth $1600, the same technology can be built for about a quarter of the price no? Now does dimming that amare light effect its spectrum cause at 10% it has a blurpley tint to the light... i know that they grow i have seen your posts and threads but honestly best bang for your buck? Its like buying 2 hlg's and only using one of them, the sf-4000 (havent tested this but looking at getting one of these or 2 sf-2000's for my next run) if you dont go to alibaba to buy it it would still be less then half the price more like a third of the price close to the same ratings... id say for the budgeter hlg is even expensive and if you feel confident enough in the manufacturers claims get the sf-4000 and try it out, $600 on amazon, and just over $300 w/shipping on alibaba, hlg 650 is going to be $1000, the 550's are between 600 and 800 depending on where you get them, the 320 hlg kits will be around 3-400, and youd want 2 of those... in any case i dont know what the best light would be from what you listed but the cheapest closest to what i think you are looking for is the sf-4000 being the cheapest and close to the same ratings as the all other lights, you can also spend hours and hours and hours researching different options on alibaba all really affordable, and really nail the most bang for your buck ratio you are looking for...