I was happy to have this guide and used the same LEDs as TheSplash and others. Not being a fan of the typical inline crimps, I used Posi-Taps (also mentioned in this thread, and yes — expensive). I wanted the DRLs to be off when the headlights (or parking lights) are on, so I added a SPDT relay that energizes the relay with the parking light wire near the PDM. (The LEDs are connected to the NC terminal, so they are off when the relay is energized.) Works well.
Initially I tried one of the cheap (~$10) DRL controllers on Amazon, but the DC-DC converter voltage is a hair too low for the controller. So the LEDs wouldn't stay on consistently. Rather than try another controller in the hopes of a lower trigger voltage, I just went with a relay. The controller dimmed the LEDs when the head/parking lights were on, which I thought was a cool feature, but not worth unreliable operation to me.
2017 Leaf SV OpenEVSE 40A