True Full Spectrum LED Grow Lights. Made in Australia with UV and Far Red. ePAR. Proven Yields, Quality and Efficiency. Price $ Per Watt.
growlightsaustralia.com
Or cutter.au 's solskin kits.
You want between 480w -600w of that level of efficiency light.
I run some of the high lights, 4 boards in a 3x3 pulling 360w, you can potentially pull 225w per board but you wouldn't want to in a 4x4.
Since you’re in Australia you should strongly consider hitting up Cutter for a strip build. From everything I read they’re extremely affordable with great customer service. They’ll build you custom PCBs to spec, build you a completely custom light, or sell you a DIY kit. The only reason I don’t shop with them is that shipping from Australia to the US isn’t cost effective.