I bought a pair of these a month ago and finally got round to fitting them last night.
Now I only fitted one at a time, and upon doing so, I got the light warning on the dash and the MFD saying both DRL's had failed although it was one LED and one OEM bulb.
Long story short, it worked with both standard bulbs, but not with one LED.
Do both bulbs need fitted to "balance" things or have they sold me two duff units? They both offered to start via a flicker, but that was all.