or 10+ (more is better, same with samsungs, they all parallel sharing 15A, so its fine. the more the strips, the higher efficiency and less heat) of bridgelux slim version
https://www.digikey.com/en/products/detail/bridgelux/BXEB-L0340U-35E0750-C-C3/10279851
then you need an alu plate or bars as heatsinks, some screws and some attitude to adventure and willing to study a bit ;)