I'm so glad I went with the 4 QB120's. I was a little nervous about wiring everything up correctly at first, but HLG has an entire page dedicated to information about the QB120. They have lists of acceptable drivers, 3 or 4 different wiring options with diagrams, and all the info you need. Wiring up the lights was the easiest part of my build.
Buy your driver from TRC. A few days after I recieved my driver from them, I recieved a call from a representative. He was just calling to see if I had any questions, which I did. He cleared everything up for me. It's a super simple and straight forward process.
Build a simple frame, keeping in mind how you will attach the boards.
The quantum boards have the connectors built into them, and all you have to do is push the wire into the connector, it's really that simple. 4 boards took me 4 minutes to wire up. I'm cheap, so I got my plug at Lowes. Wire the plug directly to the wire coming out of the driver, (hot,neutral, ground) and mount the driver close to an outlet. Simple. Get a roll of red and a roll of black 18 gauge solid wire, wire your boards up, and connect your 2 wires to the 2 wires coming out of the other side of the driver with some simple crimp connectors. Electrical tape the connections, and you're done.
I tend to go a little overboard on research. I work hard for my money, and if Im gonna spend it on something, I want to make sure I spending it on something good. I hate to waste. For the money, I couldnt even get close to this quality of a setup anywhere else. HLG is right here in America, if I have a problem I can call them today and speak with someone, and from what I have read they have excellent customer service. Not to mention you can have everything you need delivered to your house within a week, and be growing asap. No waiting for some busted ass package coming from halfway around the world. And what if it arrives damaged. That's a whole nother headache.
There are certain places where you dont want to be cheap. Lighting is the most important part of an indoor grow. You're getting 4 premium quality quantum boards for $100, a Mean Well driver, and the freedom to adjust how your light fixture is constructed so that it fits your needs exactly. For me, the leds put off just enough heat to keep my cabinet at an optimal growing temperature with an ambient temp in my house around 77 degrees. And that's without my fans on.
I promise building your own light isnt as daunting a task as it sounds. I'm so glad I pulled the trigger, I'm extremely satisfied with my choice. I've been testing some tomato and pepper plants under these lights, and they're response was incredible!!