Question about Philips Hue Play extension cable

No, it is NOT compatible.
It should correctly be called "Philips Hue Play (Light)BAR extension cable".

I quickly read "Hue Play extension cable" - which is exactly what it says - and ordered it.
Unfortunately, after receiving it, I realised that this extension cable is only compatible with Hue Play Bar and NOT with Play Gradient Lightstrip!

A small but important detail!

Well, back to Digitec (and I'm going to insist that I don't get a 10% discount because the product description is simply too inaccurate and Philips has several different "Hue Play" products on sale).

There are extension cables for Hue Play Gradient Lightstrips, https://www.philips-hue.com/de-ch...

Of course it's silly that Philips uses different connections/diameters here and didn't want to use the same plug for Play Bar and Play Lightstrip.

I can't answer that as I don't own Hue Gradient.