The ingredients I used for the build are the following:
1x heatsink from an old pyramid audio amplifier (400mmx50mmx90mm)
2x 80mm x 80mm 12v cpu fans arranged on either end for a push/pull configuration
1x cheap plastic on/off switch
1x +/- 12v out terminal
1x boost converter
1x buck converter
1x dell 275w max continuous psu
2x small heatsinks (to fill unused space.
30x 10w cool white (5,000k-7,000k) 9v-12v LED chips.
The manufacturer specs rated them at 1,000 lumens running at full power, which should give me output of 30,000 lumens. Heres some pics of it turned on: