I have Aeratron DC ceiling fans with light kits. The original lights are dimmable 3000k 'warm white'. I want to change these to 4000k 'white'. I've searched to my limits and can't find a direct swap over replacement, so I suspect I will have to replace the led chips in the light assemblies. FYI the power pins are 4mm apart which is leading me to task of replacing the actual chips. So I now need your help to locate suitable led chips from the zillions that are available. I have worked out the led board is divided into four segments of 6 leds each, each fed by its own diode, then wired in parallel. So, please help me find replacement 4000k chips Edit; I've worked out the printing on the board (6b/4c 9v) refers to 6 bulbs / 4 corners / 9volts each.