Hoya imperialis Budding Up with No Artificial Lighting

I have a two year old Hoya imperialis that is sitting on a windowsill next to my desk at the public library where I work.  It gets no special treatment; no extra lighting, no humidity, nothing added at all.  I don’t know if these buds will make it to maturity, but they are cool none the less.

Hoya imperialis 060815