Easiest DIY LED?

I want to add another 3x3x6 tent and want to give the DIY LED a go this time to try and save some money.

What's the easiest DIY setup there is with a light powerful enough for my tent? I don't mind waiting if things are cheaper on a site like Alibaba either.

Thanks in advance.

I vote for HLG QB132 with LRS 350-36 driver. Saves money and is perfect for a 3x3.

You can find some diy quantum boards on eBay. Samsung diodes. All you have to do is connect few wires.