For anyone who's replacing burnt out Octane light bar lights, a direct replacement can be purchased from Digi-Key, part number L14006-ND. These are SiC blue LED's, unlike most blue's which are InGaN, the difference being that SiC is a bit older technology and are rated for operation at 5 volts and don't require the voltage dropping resistors. Regular LED's are typically rated at 2 volts forward voltage drop, and InGaN are usually about 3.4-3.5 volts or so. The L14006's are also deep blue, 430 nM, as opposed to regular blue's which are around 480 nM. I installed two in my Octane a few days back, and they worked like a treat, no resistors required.
Remember, anode to positive, cathode to negative!