Hoya collina (or aff. collina- sp. IR-26). Mine (sp. IR-26) is jammed way behind some other plants, but I have a cutting rooting in plain view (Pardon the misshapen leaves...mechanical damage due to new leaves growing in between pots, and getting pinched in the process):

The mother plant, two and a half years ago, looked like this:

It is easily 10 times that size, even after making multipe cuttings. Nice, fast grower.

The leaves turn multiple shades of reds and greens in high light. Very attractive hoya.

I guess bight light causes the coloring?

Yes!

And the colors can be spectacular!

Two night time photos I took over the summer. A few leaves got a bit sunburned: