Personally right now if you're looking for the brightest white light that will fit inside the one-inch diameter which is common for blades I would say would be the cxb3070 from Cree which sits between 3000 and 6000 lumens although you do need to power it with 32v DC otherwise without fancy Hardware I would say that the CFT-90 from Luminous Devices in your color temperature choice operates between 3-4 volts at 22-30amps