I would beg to differ there. One of the biggest problems mini pilots have is that the small size of it means if you ever look down at the screen it can be tricky trying to find it in the sky again, and I would argue that a strobe would certainly help in that regard. But I don't think OP will find one that doesn't take his craft over the 250g let alone a strobe + a couple of navigation lights that would seriously help with VLOS extension.
It's really very frustrating that a) DJI have built nav lights into its later mini series drones, but inexplicably (and non-optionally) disables all of them (rather than just the ones up by the camera) whenever the camera is recording and b) that the law over here is not flexible enough to accommodate what would rather obviously be a big upgrade in safety and visibility for a minuscule addition in mass.