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I snagged a pair off of Amazon. The change from 3k to 6k by turning them on and off.
Low beams with 3k led fogs. 3k output Low beams with 6k led fogs. 6k output. No fog lights.
It comes as a kit. Due to time and some degree of limitation on skills I only did part of the install. I fitted the lamp units and ran the wiring back to a sensible spot. Then I paid and auto-electrician to find a suitable tap in point in the engine bay and make the connections.
From memory,
There was a blank plug to go into the end of the wiring for one of the existing fog lights,
There was a plug to go into the other existing fog unit wiring to act as a trigger,
The two new fogs plugged into two new wire runs to each corner,
There was a Live spade end (went to battery +ve)
There was a Neutral spade end (went to battery -ve)
There was a fly lead for DRL intensity (went to battery +ve for 100% brightness)
There was a wire that was spliced to the side light +ve wire (so the DRLs switch off when the sidelights come on)
There are two extra wires that should connect to the indicators on each side so that you get a cornering light effect and hazard flash, but I didn't use them