I waited a year to post this, I bought these lights 2 of them and the Controller and i have been using them for a room that has a 5x10 grow area and I can't say enough about these 550s, not only my Power Bill has dropped over 100 bucks a month my Plants are Healthier smellier and Tighter. I can't say enough about these Units. I am buying another as soon as I can, I figure one more in that size room will be a bit better but i have no complaints at all. The controller had one issue that the sent me a Patch for quickly and it works flawlessly now without one problem. I can tell anyone who's thinking about purchasing these units don't hesitate, these lights are AWESOME and my Products Prove that over and over again. For someone who's been doing this for a very long time I was skeptical at first but I made the Change and never looked back. If I could say anything about these I would say don't waste your time buying HPS bulbs every six months at 110.00 buck a bulb because they pay for themselves in a year........Thanks To Mike At California Light Works for all your Help and kindness not to mention the Great price. Thank you CLW all who designed these Great Units and Keep up the Great Work, I am looking forward to seeing what you produce in the future..... :) very happy customer......

I now have four Solar System 550 and I have very good success in veg and flower stages. The spectrum programming of these lights makes them more versatile than any other lights I've seen, and extremely productive . I would recommend this product to anyone.

I have 3 440 units and 1 550 and the 550 is most awesome

product is great, customer service is even better, but I'm on my third controller and there are still plenty of bugs in the code.

The ordering procedure and customer report from *** was exceptional.